diff --git a/docker-compose/mariadb/api-interaction.sh b/docker-compose/mariadb/api-interaction.sh
new file mode 100644
index 00000000..2bda2268
--- /dev/null
+++ b/docker-compose/mariadb/api-interaction.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Wait for services to be fully up
+sleep 15
+
+# Base URL for DB2Rest API
+BASE_URL="http://localhost/emp/employee"
+
+# Insert an employee
+echo "Inserting employee..."
+curl -X POST $BASE_URL \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Jane Smith"}'
+
+# Query all employees
+echo -e "\nQuerying all employees..."
+curl -X GET $BASE_URL
diff --git a/docker-compose/mariadb/docker-compose.yml b/docker-compose/mariadb/docker-compose.yml
new file mode 100644
index 00000000..dcd9711a
--- /dev/null
+++ b/docker-compose/mariadb/docker-compose.yml
@@ -0,0 +1,40 @@
+version: "3.8"
+services:
+  db2rest-service:
+    image: kdhrubo/db2rest:latest
+    ports:
+      - 80:8080
+    environment:
+      DB_URL: "jdbc:mariadb://employee-mariadb:3306/empdb"
+      DB_USER: "db2rest"
+      DB_PASSWORD: "db2rest"
+      INCLUDED_SCHEMAS: public,emp
+    depends_on:
+      - employee-mariadb
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/actuator/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  employee-mariadb:
+    image: "mariadb:10.6"
+    container_name: "employee-mariadb"
+    ports:
+      - 3306:3306
+    environment:
+      - MYSQL_USER=db2rest
+      - MYSQL_PASSWORD=db2rest
+      - MYSQL_DATABASE=empdb
+      - MYSQL_ROOT_PASSWORD=root
+    volumes:
+      - mariadb-data:/var/lib/mysql
+      - ./init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
+      interval: 20s
+      timeout: 10s
+      retries: 5
+
+volumes:
+  mariadb-data:
diff --git a/docker-compose/mariadb/init/01-init.sql b/docker-compose/mariadb/init/01-init.sql
new file mode 100644
index 00000000..7817934d
--- /dev/null
+++ b/docker-compose/mariadb/init/01-init.sql
@@ -0,0 +1,11 @@
+-- Create employee table
+CREATE TABLE employee (
+                          id INT AUTO_INCREMENT PRIMARY KEY,
+                          name VARCHAR(100) NOT NULL
+);
+
+-- Insert sample employee
+INSERT INTO employee (name) VALUES ('John Doe');
+
+-- Query to verify data
+SELECT * FROM employee;
diff --git a/docker-compose/mariadb/run.sh b/docker-compose/mariadb/run.sh
new file mode 100644
index 00000000..98d77b5e
--- /dev/null
+++ b/docker-compose/mariadb/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Start services
+docker-compose up -d
+
+# Run API interaction script
+chmod +x api-interaction.sh
+./api-interaction.sh
+
+# Optional: Keep services running
+docker-compose logs -f
diff --git a/docker-compose/mysql/api-interaction.sh b/docker-compose/mysql/api-interaction.sh
new file mode 100644
index 00000000..2bda2268
--- /dev/null
+++ b/docker-compose/mysql/api-interaction.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Wait for services to be fully up
+sleep 15
+
+# Base URL for DB2Rest API
+BASE_URL="http://localhost/emp/employee"
+
+# Insert an employee
+echo "Inserting employee..."
+curl -X POST $BASE_URL \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Jane Smith"}'
+
+# Query all employees
+echo -e "\nQuerying all employees..."
+curl -X GET $BASE_URL
diff --git a/docker-compose/mysql/docker-compose.yml b/docker-compose/mysql/docker-compose.yml
new file mode 100644
index 00000000..cc08cc16
--- /dev/null
+++ b/docker-compose/mysql/docker-compose.yml
@@ -0,0 +1,40 @@
+version: "3.8"
+services:
+  db2rest-service:
+    image: kdhrubo/db2rest:latest
+    ports:
+      - 80:8080
+    environment:
+      DB_URL: "jdbc:mysql://employee-mysql:3306/empdb"
+      DB_USER: "db2rest"
+      DB_PASSWORD: "db2rest"
+      INCLUDED_SCHEMAS: public,emp
+    depends_on:
+      - employee-mysql
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/actuator/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  employee-mysql:
+    image: "mysql:8.0"
+    container_name: "employee-mysql"
+    ports:
+      - 3306:3306
+    environment:
+      - MYSQL_USER=db2rest
+      - MYSQL_PASSWORD=db2rest
+      - MYSQL_DATABASE=empdb
+      - MYSQL_ROOT_PASSWORD=root
+    volumes:
+      - mysql-data:/var/lib/mysql
+      - ./init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
+      interval: 20s
+      timeout: 10s
+      retries: 5
+
+volumes:
+  mysql-data:
diff --git a/docker-compose/mysql/init/01-init.sql b/docker-compose/mysql/init/01-init.sql
new file mode 100644
index 00000000..7817934d
--- /dev/null
+++ b/docker-compose/mysql/init/01-init.sql
@@ -0,0 +1,11 @@
+-- Create employee table
+CREATE TABLE employee (
+                          id INT AUTO_INCREMENT PRIMARY KEY,
+                          name VARCHAR(100) NOT NULL
+);
+
+-- Insert sample employee
+INSERT INTO employee (name) VALUES ('John Doe');
+
+-- Query to verify data
+SELECT * FROM employee;
diff --git a/docker-compose/mysql/run.sh b/docker-compose/mysql/run.sh
new file mode 100644
index 00000000..98d77b5e
--- /dev/null
+++ b/docker-compose/mysql/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Start services
+docker-compose up -d
+
+# Run API interaction script
+chmod +x api-interaction.sh
+./api-interaction.sh
+
+# Optional: Keep services running
+docker-compose logs -f
diff --git a/docker-compose/oracle/api-interaction.sh b/docker-compose/oracle/api-interaction.sh
new file mode 100644
index 00000000..2bda2268
--- /dev/null
+++ b/docker-compose/oracle/api-interaction.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Wait for services to be fully up
+sleep 15
+
+# Base URL for DB2Rest API
+BASE_URL="http://localhost/emp/employee"
+
+# Insert an employee
+echo "Inserting employee..."
+curl -X POST $BASE_URL \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Jane Smith"}'
+
+# Query all employees
+echo -e "\nQuerying all employees..."
+curl -X GET $BASE_URL
diff --git a/docker-compose/oracle/docker-compose.yml b/docker-compose/oracle/docker-compose.yml
new file mode 100644
index 00000000..085cb12c
--- /dev/null
+++ b/docker-compose/oracle/docker-compose.yml
@@ -0,0 +1,39 @@
+version: "3.8"
+services:
+  db2rest-service:
+    image: kdhrubo/db2rest:latest
+    ports:
+      - 80:8080
+    environment:
+      DB_URL: "jdbc:oracle:thin:@employee-oracle:1521/XE"
+      DB_USER: "system"
+      DB_PASSWORD: "oracle"
+      INCLUDED_SCHEMAS: system
+    depends_on:
+      - employee-oracle
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/actuator/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  employee-oracle:
+    image: "gvenzl/oracle-xe:latest"
+    container_name: "employee-oracle"
+    ports:
+      - 1521:1521
+    environment:
+      - ORACLE_PASSWORD=oracle
+      - APP_USER=system
+      - APP_USER_PASSWORD=oracle
+    volumes:
+      - oracle-data:/opt/oracle/oradata
+      - ./init:/container-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD", "/bin/bash", "-c", "echo 'SELECT 1 FROM DUAL;' | sqlplus -s system/oracle@localhost/XE"]
+      interval: 20s
+      timeout: 10s
+      retries: 5
+
+volumes:
+  oracle-data:
diff --git a/docker-compose/oracle/init/01-init.sql b/docker-compose/oracle/init/01-init.sql
new file mode 100644
index 00000000..a56453d8
--- /dev/null
+++ b/docker-compose/oracle/init/01-init.sql
@@ -0,0 +1,11 @@
+-- Create employee table
+CREATE TABLE employee (
+                          id NUMBER GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+                          name VARCHAR2(100) NOT NULL
+);
+
+-- Insert sample employee
+INSERT INTO employee (name) VALUES ('John Doe');
+
+-- Query to verify data
+SELECT * FROM employee;
diff --git a/docker-compose/oracle/run.sh b/docker-compose/oracle/run.sh
new file mode 100644
index 00000000..98d77b5e
--- /dev/null
+++ b/docker-compose/oracle/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Start services
+docker-compose up -d
+
+# Run API interaction script
+chmod +x api-interaction.sh
+./api-interaction.sh
+
+# Optional: Keep services running
+docker-compose logs -f
diff --git a/docker-compose/postgresql/api-interaction.sh b/docker-compose/postgresql/api-interaction.sh
new file mode 100644
index 00000000..2bda2268
--- /dev/null
+++ b/docker-compose/postgresql/api-interaction.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Wait for services to be fully up
+sleep 15
+
+# Base URL for DB2Rest API
+BASE_URL="http://localhost/emp/employee"
+
+# Insert an employee
+echo "Inserting employee..."
+curl -X POST $BASE_URL \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Jane Smith"}'
+
+# Query all employees
+echo -e "\nQuerying all employees..."
+curl -X GET $BASE_URL
diff --git a/docker-compose/postgresql/docker-compose.yml b/docker-compose/postgresql/docker-compose.yml
index 5cc4a278..2a68b587 100644
--- a/docker-compose/postgresql/docker-compose.yml
+++ b/docker-compose/postgresql/docker-compose.yml
@@ -9,6 +9,13 @@ services:
       DB_USER: "db2rest"
       DB_PASSWORD: "db2rest"
       INCLUDED_SCHEMAS: public,emp
+    depends_on:
+      - employee-postgres
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/actuator/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
 
   employee-postgres:
     image: "postgres:14.4"
@@ -19,3 +26,14 @@ services:
       - POSTGRES_USER=db2rest
       - POSTGRES_PASSWORD=db2rest
       - POSTGRES_DB=empdb
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+      - ./init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U db2rest"]
+      interval: 20s
+      timeout: 10s
+      retries: 5
+
+volumes:
+  postgres-data:
diff --git a/docker-compose/postgresql/init/01-init.sql b/docker-compose/postgresql/init/01-init.sql
new file mode 100644
index 00000000..4db26a43
--- /dev/null
+++ b/docker-compose/postgresql/init/01-init.sql
@@ -0,0 +1,11 @@
+-- Create employee table
+CREATE TABLE employee (
+                          id SERIAL PRIMARY KEY,
+                          name VARCHAR(100) NOT NULL
+);
+
+-- Insert sample employee
+INSERT INTO employee (name) VALUES ('John Doe');
+
+-- Query to verify data
+SELECT * FROM employee;
diff --git a/docker-compose/postgresql/run.sh b/docker-compose/postgresql/run.sh
new file mode 100644
index 00000000..98d77b5e
--- /dev/null
+++ b/docker-compose/postgresql/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Start services
+docker-compose up -d
+
+# Run API interaction script
+chmod +x api-interaction.sh
+./api-interaction.sh
+
+# Optional: Keep services running
+docker-compose logs -f
diff --git a/docker-compose/sqlserver/api-interaction.sh b/docker-compose/sqlserver/api-interaction.sh
new file mode 100644
index 00000000..2bda2268
--- /dev/null
+++ b/docker-compose/sqlserver/api-interaction.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Wait for services to be fully up
+sleep 15
+
+# Base URL for DB2Rest API
+BASE_URL="http://localhost/emp/employee"
+
+# Insert an employee
+echo "Inserting employee..."
+curl -X POST $BASE_URL \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Jane Smith"}'
+
+# Query all employees
+echo -e "\nQuerying all employees..."
+curl -X GET $BASE_URL
diff --git a/docker-compose/sqlserver/docker-compose.yml b/docker-compose/sqlserver/docker-compose.yml
new file mode 100644
index 00000000..4925a96f
--- /dev/null
+++ b/docker-compose/sqlserver/docker-compose.yml
@@ -0,0 +1,38 @@
+version: "3.8"
+services:
+  db2rest-service:
+    image: kdhrubo/db2rest:latest
+    ports:
+      - 80:8080
+    environment:
+      DB_URL: "jdbc:sqlserver://employee-sqlserver:1433;databaseName=empdb"
+      DB_USER: "sa"
+      DB_PASSWORD: "Strong@Password123"
+      INCLUDED_SCHEMAS: dbo
+    depends_on:
+      - employee-sqlserver
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/actuator/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  employee-sqlserver:
+    image: "mcr.microsoft.com/mssql/server:2019-latest"
+    container_name: "employee-sqlserver"
+    ports:
+      - 1433:1433
+    environment:
+      - SA_PASSWORD=Strong@Password123
+      - ACCEPT_EULA=Y
+    volumes:
+      - sqlserver-data:/var/opt/mssql
+      - ./init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD-SHELL", "/opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P Strong@Password123 -Q 'SELECT 1'"]
+      interval: 20s
+      timeout: 10s
+      retries: 5
+
+volumes:
+  sqlserver-data:
diff --git a/docker-compose/sqlserver/init/01-init.sql b/docker-compose/sqlserver/init/01-init.sql
new file mode 100644
index 00000000..c8a9da34
--- /dev/null
+++ b/docker-compose/sqlserver/init/01-init.sql
@@ -0,0 +1,11 @@
+-- Create employee table
+CREATE TABLE employee (
+                          id INT IDENTITY(1,1) PRIMARY KEY,
+                          name NVARCHAR(100) NOT NULL
+);
+
+-- Insert sample employee
+INSERT INTO employee (name) VALUES ('John Doe');
+
+-- Query to verify data
+SELECT * FROM employee;
diff --git a/docker-compose/sqlserver/run.sh b/docker-compose/sqlserver/run.sh
new file mode 100644
index 00000000..98d77b5e
--- /dev/null
+++ b/docker-compose/sqlserver/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Start services
+docker-compose up -d
+
+# Run API interaction script
+chmod +x api-interaction.sh
+./api-interaction.sh
+
+# Optional: Keep services running
+docker-compose logs -f
diff --git a/pom.xml b/pom.xml
index 79695716..6b99facc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -162,6 +162,27 @@
             <version>2.3.2</version>
         </dependency>
 
+        <!-- Apache Calcite -->
+        <dependency>
+            <groupId>org.apache.calcite</groupId>
+            <artifactId>calcite-core</artifactId>
+            <version>1.32.0</version>
+        </dependency>
+        
+        <!-- MySQL Connector -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.27</version>
+        </dependency>
+        
+        <!-- PostgreSQL Connector -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.3.1</version>
+        </dependency>
+
     </dependencies>
     <profiles>
         <profile>