diff --git a/.idea/dataSources.xml b/.idea/dataSources.xml
new file mode 100644
index 0000000..63a12b6
--- /dev/null
+++ b/.idea/dataSources.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="postgres@localhost" uuid="d6a94836-907f-44a6-862f-b98acfacd192">
+      <driver-ref>postgresql</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
+      <jdbc-url>jdbc:postgresql://localhost:5432/postgres</jdbc-url>
+      <jdbc-additional-properties>
+        <property name="com.intellij.clouds.kubernetes.db.host.port" />
+        <property name="com.intellij.clouds.kubernetes.db.enabled" value="false" />
+        <property name="com.intellij.clouds.kubernetes.db.resource.type" value="Deployment" />
+        <property name="com.intellij.clouds.kubernetes.db.container.port" />
+      </jdbc-additional-properties>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/sqldialects.xml b/.idea/sqldialects.xml
new file mode 100644
index 0000000..7ed6e52
--- /dev/null
+++ b/.idea/sqldialects.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="SqlDialectMappings">
+    <file url="file://$PROJECT_DIR$/sql/createDB.sql" dialect="PostgreSQL" />
+    <file url="file://$PROJECT_DIR$/sql/rollbackDB.sql" dialect="PostgreSQL" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/sql/createDB.sql b/sql/createDB.sql
index 3c52805..c5b57e8 100644
--- a/sql/createDB.sql
+++ b/sql/createDB.sql
@@ -1,5 +1,5 @@
 CREATE
-DATABASE autohaendler;
+    DATABASE autohaendler;
 \c
 autohaendler
 
@@ -11,11 +11,10 @@ CREATE TYPE price;
 CREATE TYPE doors;
 
 CREATE
-EXTENSION IF NOT EXISTS "uuid-ossp";
+    EXTENSION IF NOT EXISTS "uuid-ossp";
 
 CREATE TABLE autohaendler_stock
 (
-    id     UUID NOT NULL DEFAULT uuid_generate_v4(),
     color  TEXT NOT NULL,
     make   TEXT NOT NULL,
     model  TEXT NOT NULL,
diff --git a/src/backend/example/database_calls/getDatabaseTable.php b/src/backend/example/database_calls/getDatabaseTable.php
new file mode 100644
index 0000000..cfab334
--- /dev/null
+++ b/src/backend/example/database_calls/getDatabaseTable.php
@@ -0,0 +1,38 @@
+<?php
+$hostname = "hostname/IP";
+$username = "username";
+$password = "password";
+$db_name = "databaseName";
+$port = "webport";
+
+$sqlArray = [];
+
+// get PHP config
+$root_pfad = $_SERVER["DOCUMENT_ROOT"] . "/core";
+require_once $root_pfad . "/config/global.inc.php";
+header("Content-Type: text/html; charset=utf-8");
+
+// start new connection to database
+$conn = new mysqli($hostname, $username, $password, $db_name, $port);
+$conn->set_charset("utf8mb4");
+// close connection on error
+if ($conn->connect_error) {
+    die("Connection failed: " . $conn->connect_error);
+}
+
+// prepare SQL statement and execute on database
+$sql = "SELECT * FROM table";
+// get data from database
+$result = $conn->query($sql);
+$conn->close();
+
+// check if result is empty & has more than "0" rows
+if (!empty($result) && (int)$result->num_rows > 0) {
+    while ($row = $result->fetch_assoc()) {
+        $sqlArray[] = $row;
+    }
+    echo json_encode($sqlArray);
+} else {
+    echo "0 results";
+}
+exit();
diff --git a/src/backend/example/database_calls/startAjax.js b/src/backend/example/database_calls/startAjax.js
new file mode 100644
index 0000000..7e97f61
--- /dev/null
+++ b/src/backend/example/database_calls/startAjax.js
@@ -0,0 +1,16 @@
+$(document).ready(function () {
+
+    // ajax function to call PHP script on webserver
+    $.ajax({
+        type: "POST",   // use what "type" is necessary, POST is most common
+        url: "getDatabaseTable.php",    // path to .php file that will be executed
+        dataType: "json",   // return type of the PHP script
+        success: function (data) {
+            console.log("successfully called PHP file!")
+            // implement logic to write json into HTML here
+        },
+        error: function () {
+            console.log("failed to call PHP file!")
+        }
+    });
+})
\ No newline at end of file
diff --git a/src/01_counter/app.js b/src/frontend/01_counter/app.js
similarity index 100%
rename from src/01_counter/app.js
rename to src/frontend/01_counter/app.js
diff --git a/src/01_counter/index.html b/src/frontend/01_counter/index.html
similarity index 100%
rename from src/01_counter/index.html
rename to src/frontend/01_counter/index.html
diff --git a/src/frontend/example/index.html b/src/frontend/example/index.html
new file mode 100644
index 0000000..64b999f
--- /dev/null
+++ b/src/frontend/example/index.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Example 1</title>
+    <link rel="stylesheet" href="/src/styles.css">
+</head>
+<body>
+
+</body>
+</html>
\ No newline at end of file