diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..ab1f416
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/.idea/CoolRequestSetting.xml b/.idea/CoolRequestSetting.xml
new file mode 100644
index 0000000..dc755a4
--- /dev/null
+++ b/.idea/CoolRequestSetting.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/dbnavigator.xml b/.idea/dbnavigator.xml
new file mode 100644
index 0000000..c87a7de
--- /dev/null
+++ b/.idea/dbnavigator.xml
@@ -0,0 +1,458 @@
+
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\ No newline at end of file
diff --git a/.idea/lab-java-normalization-ddl-aggregation.iml b/.idea/lab-java-normalization-ddl-aggregation.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/.idea/lab-java-normalization-ddl-aggregation.iml
@@ -0,0 +1,9 @@
+
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+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..8f3e139
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..152076a
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+
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+
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..8306744
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,7 @@
+
+
+
+
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+
+
\ No newline at end of file
diff --git a/NormalizationDDLAggregation/.gitattributes b/NormalizationDDLAggregation/.gitattributes
new file mode 100644
index 0000000..3b41682
--- /dev/null
+++ b/NormalizationDDLAggregation/.gitattributes
@@ -0,0 +1,2 @@
+/mvnw text eol=lf
+*.cmd text eol=crlf
diff --git a/NormalizationDDLAggregation/.gitignore b/NormalizationDDLAggregation/.gitignore
new file mode 100644
index 0000000..667aaef
--- /dev/null
+++ b/NormalizationDDLAggregation/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+target/
+.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/NormalizationDDLAggregation/.mvn/wrapper/maven-wrapper.properties b/NormalizationDDLAggregation/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..5291372
--- /dev/null
+++ b/NormalizationDDLAggregation/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,3 @@
+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.15/apache-maven-3.9.15-bin.zip
diff --git a/NormalizationDDLAggregation/mvnw b/NormalizationDDLAggregation/mvnw
new file mode 100644
index 0000000..bd8896b
--- /dev/null
+++ b/NormalizationDDLAggregation/mvnw
@@ -0,0 +1,295 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.3.4
+#
+# Optional ENV vars
+# -----------------
+# JAVA_HOME - location of a JDK home dir, required when download maven via java source
+# MVNW_REPOURL - repo url base for downloading maven distribution
+# MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+# MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
+# ----------------------------------------------------------------------------
+
+set -euf
+[ "${MVNW_VERBOSE-}" != debug ] || set -x
+
+# OS specific support.
+native_path() { printf %s\\n "$1"; }
+case "$(uname)" in
+CYGWIN* | MINGW*)
+ [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
+ native_path() { cygpath --path --windows "$1"; }
+ ;;
+esac
+
+# set JAVACMD and JAVACCMD
+set_java_home() {
+ # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
+ if [ -n "${JAVA_HOME-}" ]; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ JAVACCMD="$JAVA_HOME/jre/sh/javac"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ JAVACCMD="$JAVA_HOME/bin/javac"
+
+ if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
+ echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
+ echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
+ return 1
+ fi
+ fi
+ else
+ JAVACMD="$(
+ 'set' +e
+ 'unset' -f command 2>/dev/null
+ 'command' -v java
+ )" || :
+ JAVACCMD="$(
+ 'set' +e
+ 'unset' -f command 2>/dev/null
+ 'command' -v javac
+ )" || :
+
+ if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
+ echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
+ return 1
+ fi
+ fi
+}
+
+# hash string like Java String::hashCode
+hash_string() {
+ str="${1:-}" h=0
+ while [ -n "$str" ]; do
+ char="${str%"${str#?}"}"
+ h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
+ str="${str#?}"
+ done
+ printf %x\\n $h
+}
+
+verbose() { :; }
+[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
+
+die() {
+ printf %s\\n "$1" >&2
+ exit 1
+}
+
+trim() {
+ # MWRAPPER-139:
+ # Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
+ # Needed for removing poorly interpreted newline sequences when running in more
+ # exotic environments such as mingw bash on Windows.
+ printf "%s" "${1}" | tr -d '[:space:]'
+}
+
+scriptDir="$(dirname "$0")"
+scriptName="$(basename "$0")"
+
+# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
+while IFS="=" read -r key value; do
+ case "${key-}" in
+ distributionUrl) distributionUrl=$(trim "${value-}") ;;
+ distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
+ esac
+done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+
+case "${distributionUrl##*/}" in
+maven-mvnd-*bin.*)
+ MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
+ case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
+ *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
+ :Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
+ :Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
+ :Linux*x86_64*) distributionPlatform=linux-amd64 ;;
+ *)
+ echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
+ distributionPlatform=linux-amd64
+ ;;
+ esac
+ distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
+ ;;
+maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
+*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+esac
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/
+[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
+distributionUrlName="${distributionUrl##*/}"
+distributionUrlNameMain="${distributionUrlName%.*}"
+distributionUrlNameMain="${distributionUrlNameMain%-bin}"
+MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
+MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
+
+exec_maven() {
+ unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
+ exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
+}
+
+if [ -d "$MAVEN_HOME" ]; then
+ verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+ exec_maven "$@"
+fi
+
+case "${distributionUrl-}" in
+*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
+*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
+esac
+
+# prepare tmp dir
+if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
+ clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
+ trap clean HUP INT TERM EXIT
+else
+ die "cannot create temp dir"
+fi
+
+mkdir -p -- "${MAVEN_HOME%/*}"
+
+# Download and Install Apache Maven
+verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+verbose "Downloading from: $distributionUrl"
+verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+# select .zip or .tar.gz
+if ! command -v unzip >/dev/null; then
+ distributionUrl="${distributionUrl%.zip}.tar.gz"
+ distributionUrlName="${distributionUrl##*/}"
+fi
+
+# verbose opt
+__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
+[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
+
+# normalize http auth
+case "${MVNW_PASSWORD:+has-password}" in
+'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+esac
+
+if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
+ verbose "Found wget ... using wget"
+ wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
+elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
+ verbose "Found curl ... using curl"
+ curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
+elif set_java_home; then
+ verbose "Falling back to use Java to download"
+ javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
+ targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
+ cat >"$javaSource" <<-END
+ public class Downloader extends java.net.Authenticator
+ {
+ protected java.net.PasswordAuthentication getPasswordAuthentication()
+ {
+ return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
+ }
+ public static void main( String[] args ) throws Exception
+ {
+ setDefault( new Downloader() );
+ java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
+ }
+ }
+ END
+ # For Cygwin/MinGW, switch paths to Windows format before running javac and java
+ verbose " - Compiling Downloader.java ..."
+ "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
+ verbose " - Running Downloader.java ..."
+ "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
+fi
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+if [ -n "${distributionSha256Sum-}" ]; then
+ distributionSha256Result=false
+ if [ "$MVN_CMD" = mvnd.sh ]; then
+ echo "Checksum validation is not supported for maven-mvnd." >&2
+ echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+ exit 1
+ elif command -v sha256sum >/dev/null; then
+ if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then
+ distributionSha256Result=true
+ fi
+ elif command -v shasum >/dev/null; then
+ if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
+ distributionSha256Result=true
+ fi
+ else
+ echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
+ echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+ exit 1
+ fi
+ if [ $distributionSha256Result = false ]; then
+ echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
+ echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
+ exit 1
+ fi
+fi
+
+# unzip and move
+if command -v unzip >/dev/null; then
+ unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
+else
+ tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
+fi
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+actualDistributionDir=""
+
+# First try the expected directory name (for regular distributions)
+if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then
+ if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then
+ actualDistributionDir="$distributionUrlNameMain"
+ fi
+fi
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if [ -z "$actualDistributionDir" ]; then
+ # enable globbing to iterate over items
+ set +f
+ for dir in "$TMP_DOWNLOAD_DIR"/*; do
+ if [ -d "$dir" ]; then
+ if [ -f "$dir/bin/$MVN_CMD" ]; then
+ actualDistributionDir="$(basename "$dir")"
+ break
+ fi
+ fi
+ done
+ set -f
+fi
+
+if [ -z "$actualDistributionDir" ]; then
+ verbose "Contents of $TMP_DOWNLOAD_DIR:"
+ verbose "$(ls -la "$TMP_DOWNLOAD_DIR")"
+ die "Could not find Maven distribution directory in extracted archive"
+fi
+
+verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+clean || :
+exec_maven "$@"
diff --git a/NormalizationDDLAggregation/mvnw.cmd b/NormalizationDDLAggregation/mvnw.cmd
new file mode 100644
index 0000000..92450f9
--- /dev/null
+++ b/NormalizationDDLAggregation/mvnw.cmd
@@ -0,0 +1,189 @@
+<# : batch portion
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements. See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership. The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License. You may obtain a copy of the License at
+@REM
+@REM http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied. See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.3.4
+@REM
+@REM Optional ENV vars
+@REM MVNW_REPOURL - repo url base for downloading maven distribution
+@REM MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+@REM MVNW_VERBOSE - true: enable verbose log; others: silence the output
+@REM ----------------------------------------------------------------------------
+
+@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
+@SET __MVNW_CMD__=
+@SET __MVNW_ERROR__=
+@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
+@SET PSModulePath=
+@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
+ IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
+)
+@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
+@SET __MVNW_PSMODULEP_SAVE=
+@SET __MVNW_ARG0_NAME__=
+@SET MVNW_USERNAME=
+@SET MVNW_PASSWORD=
+@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*)
+@echo Cannot start maven from wrapper >&2 && exit /b 1
+@GOTO :EOF
+: end batch / begin powershell #>
+
+$ErrorActionPreference = "Stop"
+if ($env:MVNW_VERBOSE -eq "true") {
+ $VerbosePreference = "Continue"
+}
+
+# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
+$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
+if (!$distributionUrl) {
+ Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+}
+
+switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
+ "maven-mvnd-*" {
+ $USE_MVND = $true
+ $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
+ $MVN_CMD = "mvnd.cmd"
+ break
+ }
+ default {
+ $USE_MVND = $false
+ $MVN_CMD = $script -replace '^mvnw','mvn'
+ break
+ }
+}
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/
+if ($env:MVNW_REPOURL) {
+ $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+ $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')"
+}
+$distributionUrlName = $distributionUrl -replace '^.*/',''
+$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
+
+$MAVEN_M2_PATH = "$HOME/.m2"
+if ($env:MAVEN_USER_HOME) {
+ $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME"
+}
+
+if (-not (Test-Path -Path $MAVEN_M2_PATH)) {
+ New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null
+}
+
+$MAVEN_WRAPPER_DISTS = $null
+if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) {
+ $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists"
+} else {
+ $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists"
+}
+
+$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain"
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
+
+if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
+ Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+ Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
+ exit $?
+}
+
+if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
+ Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
+}
+
+# prepare tmp dir
+$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
+$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
+$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
+trap {
+ if ($TMP_DOWNLOAD_DIR.Exists) {
+ try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+ catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+ }
+}
+
+New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
+
+# Download and Install Apache Maven
+Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+Write-Verbose "Downloading from: $distributionUrl"
+Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+$webclient = New-Object System.Net.WebClient
+if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
+ $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
+}
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
+if ($distributionSha256Sum) {
+ if ($USE_MVND) {
+ Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
+ }
+ Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
+ if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
+ Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
+ }
+}
+
+# unzip and move
+Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+$actualDistributionDir = ""
+
+# First try the expected directory name (for regular distributions)
+$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain"
+$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD"
+if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) {
+ $actualDistributionDir = $distributionUrlNameMain
+}
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if (!$actualDistributionDir) {
+ Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object {
+ $testPath = Join-Path $_.FullName "bin/$MVN_CMD"
+ if (Test-Path -Path $testPath -PathType Leaf) {
+ $actualDistributionDir = $_.Name
+ }
+ }
+}
+
+if (!$actualDistributionDir) {
+ Write-Error "Could not find Maven distribution directory in extracted archive"
+}
+
+Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null
+try {
+ Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
+} catch {
+ if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
+ Write-Error "fail to move MAVEN_HOME"
+ }
+} finally {
+ try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+ catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+}
+
+Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
diff --git a/NormalizationDDLAggregation/normalazationDDL.AggregationLab6.sql b/NormalizationDDLAggregation/normalazationDDL.AggregationLab6.sql
new file mode 100644
index 0000000..9155071
--- /dev/null
+++ b/NormalizationDDLAggregation/normalazationDDL.AggregationLab6.sql
@@ -0,0 +1,269 @@
+-- ============================================================
+-- DATABASE NORMALIZATION LAB
+-- Exercises 1, 2, and 3
+-- ============================================================
+
+
+-- ============================================================
+-- EXERCISE 1: Blog Database (3NF)
+-- ============================================================
+CREATE DATABASE IF NOT EXISTS normalizationDDLAggregation_lab;
+
+USE normalizationDDLAggregation_lab;
+
+-- Drop tables if re-running (order matters due to FK constraints)
+DROP TABLE IF EXISTS posts;
+DROP TABLE IF EXISTS authors;
+
+-- Authors table: stores each author exactly once.
+-- Eliminates the redundancy of repeating author names across posts.
+CREATE TABLE authors (
+ id INT PRIMARY KEY AUTO_INCREMENT,
+ name VARCHAR(100) NOT NULL UNIQUE -- each author name must be unique
+);
+
+-- Posts table: references authors via FK.
+-- word_count and views depend only on the post (id), not on the author.
+CREATE TABLE posts (
+ id INT PRIMARY KEY AUTO_INCREMENT,
+ author_id INT NOT NULL,
+ title VARCHAR(255) NOT NULL UNIQUE, -- post titles are unique
+ word_count INT NOT NULL CHECK (word_count > 0), -- must be a positive number
+ views INT NOT NULL DEFAULT 0
+ CHECK (views >= 0), -- cannot be negative
+ FOREIGN KEY (author_id) REFERENCES authors(id)
+);
+
+-- Index: speeds up lookups like "all posts by a given author"
+CREATE INDEX idx_posts_author ON posts(author_id);
+
+
+-- ------------------------------------------------------------
+-- Exercise 1: INSERT sample data
+-- ------------------------------------------------------------
+
+INSERT INTO authors (name) VALUES
+ ('Maria Charlotte'),
+ ('Juan Perez'),
+ ('Gemma Alcocer');
+
+-- author_id references: 1=Maria Charlotte, 2=Juan Perez, 3=Gemma Alcocer
+INSERT INTO posts (author_id, title, word_count, views) VALUES
+ (1, 'Best Paint Colors', 814, 14),
+ (2, 'Small Space Decorating Tips', 1146, 221),
+ (1, 'Hot Accessories', 986, 105),
+ (1, 'Mixing Textures', 765, 22),
+ (2, 'Kitchen Refresh', 1242, 307),
+ (1, 'Homemade Art Hacks', 1002, 193),
+ (3, 'Refinishing Wood Floors', 1571, 7542);
+
+
+-- ============================================================
+-- EXERCISE 2: Airline Database (3NF)
+-- ============================================================
+
+-- Drop tables if re-running (order matters due to FK constraints)
+DROP TABLE IF EXISTS bookings;
+DROP TABLE IF EXISTS flights;
+DROP TABLE IF EXISTS customers;
+DROP TABLE IF EXISTS aircrafts;
+
+-- Aircraft models: seat count is a property of the aircraft type,
+-- not of any individual flight. Removing it from flights eliminates
+-- a transitive dependency (flight_number → aircraft → total_seats).
+CREATE TABLE aircrafts (
+ id INT PRIMARY KEY AUTO_INCREMENT,
+ name VARCHAR(100) NOT NULL UNIQUE, -- e.g. "Boeing 747"
+ total_seats INT NOT NULL CHECK (total_seats > 0) -- must have at least one seat
+);
+
+-- Customers: status and total mileage are properties of the customer,
+-- not of any booking or flight. Isolating them here removes the
+-- massive row duplication seen in the raw dataset.
+CREATE TABLE customers (
+ id INT PRIMARY KEY AUTO_INCREMENT,
+ name VARCHAR(100) NOT NULL UNIQUE,
+ status VARCHAR(20) NOT NULL DEFAULT 'None'
+ CHECK (status IN ('None', 'Silver', 'Gold')), -- enforces valid tiers
+ total_mileage INT NOT NULL DEFAULT 0
+ CHECK (total_mileage >= 0) -- cannot be negative
+);
+
+-- Flights: a flight number maps to exactly one aircraft and one distance.
+-- flight_number is the natural key (e.g. "DL143") — no surrogate needed.
+CREATE TABLE flights (
+ flight_number VARCHAR(10) PRIMARY KEY,
+ aircraft_id INT NOT NULL,
+ mileage INT NOT NULL CHECK (mileage > 0), -- must be a positive distance
+ FOREIGN KEY (aircraft_id) REFERENCES aircrafts(id)
+);
+
+-- Bookings: junction table linking customers to flights.
+-- The composite PK (customer_id, flight_number) naturally prevents
+-- a customer from being booked on the same flight more than once.
+CREATE TABLE bookings (
+ customer_id INT NOT NULL,
+ flight_number VARCHAR(10) NOT NULL,
+ PRIMARY KEY (customer_id, flight_number), -- composite PK = uniqueness constraint
+ FOREIGN KEY (customer_id) REFERENCES customers(id),
+ FOREIGN KEY (flight_number) REFERENCES flights(flight_number)
+);
+
+-- Indexes: support the most common query patterns
+-- "All bookings for a given customer" (used in mileage queries)
+CREATE INDEX idx_bookings_customer ON bookings(customer_id);
+-- "All customers on a given flight" (used in load/manifest queries)
+CREATE INDEX idx_bookings_flight ON bookings(flight_number);
+-- "All flights operated by a given aircraft type"
+CREATE INDEX idx_flights_aircraft ON flights(aircraft_id);
+
+
+-- ------------------------------------------------------------
+-- Exercise 2: INSERT sample data
+-- ------------------------------------------------------------
+
+-- aircraft_id auto-assigned: 1=Boeing 747, 2=Airbus A330, 3=Boeing 777
+INSERT INTO aircrafts (name, total_seats) VALUES
+ ('Boeing 747', 400),
+ ('Airbus A330', 236),
+ ('Boeing 777', 264);
+
+-- customer_id auto-assigned: 1=Agustine, 2=Alaina, 3=Tom, 4=Sam,
+-- 5=Jessica, 6=Ana, 7=Jennifer, 8=Christian
+INSERT INTO customers (name, status, total_mileage) VALUES
+ ('Agustine Riviera', 'Silver', 115235),
+ ('Alaina Sepulvida', 'None', 6008),
+ ('Tom Jones', 'Gold', 205767),
+ ('Sam Rio', 'None', 2653),
+ ('Jessica James', 'Silver', 127656),
+ ('Ana Janco', 'Silver', 136773),
+ ('Jennifer Cortez', 'Gold', 300582),
+ ('Christian Janco', 'Silver', 14642);
+
+-- aircraft_id references: 1=Boeing 747, 2=Airbus A330, 3=Boeing 777
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES
+ ('DL143', 1, 135),
+ ('DL122', 2, 4370),
+ ('DL53', 3, 2078),
+ ('DL222', 3, 1765),
+ ('DL37', 1, 531);
+
+-- Bookings deduped from the raw dataset.
+-- Each unique (customer, flight) pair appears exactly once.
+INSERT INTO bookings (customer_id, flight_number) VALUES
+ (1, 'DL143'), -- Agustine Riviera on DL143
+ (1, 'DL122'), -- Agustine Riviera on DL122
+ (2, 'DL122'), -- Alaina Sepulvida on DL122
+ (3, 'DL122'), -- Tom Jones on DL122
+ (3, 'DL53'), -- Tom Jones on DL53
+ (3, 'DL222'), -- Tom Jones on DL222
+ (4, 'DL143'), -- Sam Rio on DL143
+ (4, 'DL37'), -- Sam Rio on DL37
+ (5, 'DL143'), -- Jessica James on DL143
+ (5, 'DL122'), -- Jessica James on DL122
+ (6, 'DL222'), -- Ana Janco on DL222
+ (7, 'DL222'), -- Jennifer Cortez on DL222
+ (8, 'DL222'); -- Christian Janco on DL222
+
+
+-- ============================================================
+-- EXERCISE 3: SQL Queries on the Airline Database
+-- ============================================================
+
+-- ------------------------------------------------------------
+-- Query 1: Total number of distinct flights
+-- ------------------------------------------------------------
+SELECT COUNT(DISTINCT flight_number) AS total_flights
+FROM flights;
+-- Expected result: 5
+
+
+-- ------------------------------------------------------------
+-- Query 2: Average flight distance across all flights
+-- ------------------------------------------------------------
+SELECT AVG(mileage) AS avg_flight_distance
+FROM flights;
+-- Expected result: (135 + 4370 + 2078 + 1765 + 531) / 5 = 1775.8
+
+
+-- ------------------------------------------------------------
+-- Query 3: Average number of seats per aircraft type
+-- ------------------------------------------------------------
+SELECT AVG(total_seats) AS avg_seats_per_aircraft
+FROM aircrafts;
+-- Expected result: (400 + 236 + 264) / 3 = 300
+
+
+-- ------------------------------------------------------------
+-- Query 4: Average total customer mileage, grouped by status
+-- Useful for understanding how engaged each loyalty tier is.
+-- ------------------------------------------------------------
+SELECT status,
+ AVG(total_mileage) AS avg_mileage
+FROM customers
+GROUP BY status;
+
+
+-- ------------------------------------------------------------
+-- Query 5: Max total customer mileage, grouped by status
+-- Identifies the highest-mileage customer in each tier.
+-- ------------------------------------------------------------
+SELECT status,
+ MAX(total_mileage) AS max_mileage
+FROM customers
+GROUP BY status;
+
+
+-- ------------------------------------------------------------
+-- Query 6: Count of aircraft whose name contains "Boeing"
+-- LIKE with % wildcard matches any string containing "Boeing".
+-- ------------------------------------------------------------
+SELECT COUNT(*) AS boeing_count
+FROM aircrafts
+WHERE name LIKE '%Boeing%';
+-- Expected result: 2 (Boeing 747, Boeing 777)
+
+
+-- ------------------------------------------------------------
+-- Query 7: Flights with distance between 300 and 2000 miles
+-- BETWEEN is inclusive on both ends (300 ≤ mileage ≤ 2000).
+-- ------------------------------------------------------------
+SELECT *
+FROM flights
+WHERE mileage BETWEEN 300 AND 2000;
+-- Expected result: DL222 (1765 mi), DL37 (531 mi)
+-- Excluded: DL143 (135), DL122 (4370), DL53 (2078)
+
+
+-- ------------------------------------------------------------
+-- Query 8: Average booked flight distance, grouped by customer status
+-- Joins bookings → customers (for status) and bookings → flights (for mileage).
+-- Shows whether premium-status customers tend to fly longer routes.
+-- ------------------------------------------------------------
+SELECT c.status,
+ AVG(f.mileage) AS avg_booked_distance
+FROM bookings b
+ JOIN customers c ON b.customer_id = c.id
+ JOIN flights f ON b.flight_number = f.flight_number
+GROUP BY c.status;
+
+
+-- ------------------------------------------------------------
+-- Query 9: Most booked aircraft among Gold status customers
+-- Traverses: bookings → customers (filter Gold)
+-- → flights → aircrafts
+-- GROUP BY aircraft name, order descending, take the top result.
+-- ------------------------------------------------------------
+SELECT a.name,
+ COUNT(*) AS total_bookings
+FROM bookings b
+ JOIN customers c ON b.customer_id = c.id
+ JOIN flights f ON b.flight_number = f.flight_number
+ JOIN aircrafts a ON f.aircraft_id = a.id
+WHERE c.status = 'Gold'
+GROUP BY a.name
+ORDER BY total_bookings DESC
+LIMIT 1;
+-- Gold customers: Tom Jones → DL122 (A330), DL53 (777), DL222 (777)
+-- Jennifer Cortez → DL222 (777)
+-- Boeing 777 gets 3 bookings → most booked among Gold status
\ No newline at end of file
diff --git a/NormalizationDDLAggregation/pom.xml b/NormalizationDDLAggregation/pom.xml
new file mode 100644
index 0000000..2d04999
--- /dev/null
+++ b/NormalizationDDLAggregation/pom.xml
@@ -0,0 +1,150 @@
+
+
+ 4.0.0
+
+ org.springframework.boot
+ spring-boot-starter-parent
+ 4.0.6
+
+
+ com.ironhacklab5
+ NormalizationDDLAggregation
+ 0.0.1-SNAPSHOT
+ NormalizationDDLAggregation
+ NormalizationDDLAggregation
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ 17
+
+
+
+ org.springframework.boot
+ spring-boot-h2console
+
+
+ org.springframework.boot
+ spring-boot-starter-data-jpa
+
+
+ org.springframework.boot
+ spring-boot-starter-security
+
+
+ org.springframework.boot
+ spring-boot-starter-validation
+
+
+ org.springframework.boot
+ spring-boot-starter-webmvc
+
+
+
+ org.springframework.boot
+ spring-boot-devtools
+ runtime
+ true
+
+
+ com.h2database
+ h2
+ runtime
+
+
+ com.mysql
+ mysql-connector-j
+ runtime
+
+
+ org.projectlombok
+ lombok
+ true
+
+
+ org.springframework.boot
+ spring-boot-starter-data-jpa-test
+ test
+
+
+ org.springframework.boot
+ spring-boot-starter-security-test
+ test
+
+
+ org.springframework.boot
+ spring-boot-starter-validation-test
+ test
+
+
+ org.springframework.boot
+ spring-boot-starter-webmvc-test
+ test
+
+
+
+
+
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
+
+
+ org.projectlombok
+ lombok
+
+
+
+
+
+ org.apache.maven.plugins
+ maven-compiler-plugin
+
+
+ default-compile
+ compile
+
+ compile
+
+
+
+
+ org.projectlombok
+ lombok
+
+
+
+
+
+ default-testCompile
+ test-compile
+
+ testCompile
+
+
+
+
+ org.projectlombok
+ lombok
+
+
+
+
+
+
+
+
+
+
diff --git a/NormalizationDDLAggregation/src/main/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplication.java b/NormalizationDDLAggregation/src/main/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplication.java
new file mode 100644
index 0000000..67816d0
--- /dev/null
+++ b/NormalizationDDLAggregation/src/main/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplication.java
@@ -0,0 +1,13 @@
+package com.ironhacklab5.normalizationddlaggregation;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class NormalizationDdlAggregationApplication {
+
+ public static void main(String[] args) {
+ SpringApplication.run(NormalizationDdlAggregationApplication.class, args);
+ }
+
+}
diff --git a/NormalizationDDLAggregation/src/main/resources/application.properties b/NormalizationDDLAggregation/src/main/resources/application.properties
new file mode 100644
index 0000000..b51b016
--- /dev/null
+++ b/NormalizationDDLAggregation/src/main/resources/application.properties
@@ -0,0 +1,18 @@
+spring.application.name=NormalizationDDLAggregation
+```properties
+# MySQL Database Connection
+spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
+
+spring.datasource.username= root
+spring.datasource.password= root
+
+# MySQL Driver
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# Hibernate / JPA
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true
+
+# Optional - MySQL Dialect
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
+```
diff --git a/NormalizationDDLAggregation/src/test/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplicationTests.java b/NormalizationDDLAggregation/src/test/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplicationTests.java
new file mode 100644
index 0000000..8362ec8
--- /dev/null
+++ b/NormalizationDDLAggregation/src/test/java/com/ironhacklab5/normalizationddlaggregation/NormalizationDdlAggregationApplicationTests.java
@@ -0,0 +1,13 @@
+package com.ironhacklab5.normalizationddlaggregation;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class NormalizationDdlAggregationApplicationTests {
+
+ @Test
+ void contextLoads() {
+ }
+
+}