Create a Table in JavaDB Using JDBC

You can create a table in JavaDB database using the CREATE TABLE statement.

Syntax

CREATE TABLE table_name (
   column_name1 column_data_type1 constraint (optional),
   column_name2 column_data_type2 constraint (optional),
   column_name3 column_data_type3 constraint (optional)
);

To create a table in JavaDB using JDBC API you need to −

• Register the driver − The forName() method of the class, Class accepts a String value representing a class name loads it in to the memory, which automatically registers it. Register the driver using this method.
• Establish a connection − Connect ot the database using the getConnection() method of the DriverManager class. Passing URL (String), username (String), password (String) as parameters to it.
• Create Statement − Create a Statement object using the createStatement() method of the Connection interface.
• Execute the Query − Execute the query using the execute() method of the Statement interface.

Following JDBC program establishes connection with JavaDB database and creates a table named customers in it.

Example

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class CreatingTable {
   public static void main(String args[]) throws Exception {
      //Registering the driver
      Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
      //Getting the Connection object
      String URL = "jdbc:derby:sampledatabase;create=true";
      Connection conn = DriverManager.getConnection(URL);
      //Creating the Statement object
      Statement stmt = conn.createStatement();
      //Query to create a table in JavaDB database
      String query = "CREATE TABLE Employee_data( "
         + "Id INT NOT NULL GENERATED ALWAYS AS IDENTITY, "
         + "Name VARCHAR(255), "
         + "Salary INT NOT NULL, "
         + "Location VARCHAR(255), "
         + "PRIMARY KEY (Id))";
      //Executing the query
      stmt.execute(query);
      System.out.println("Table created");
   }
}

Output

Connection established......
Table Created......