HSQLDB - Create Table


Advertisements


The basic mandatory requirements to create a table are table name, field names, and the data types to those fields. Optionally, you can also provide the key constraints to the table.

Syntax

Take a look at the following syntax.

CREATE TABLE table_name (column_name column_type);

Example

Let us create a table named tutorials_tbl with the field-names such as id, title, author, and submission_date. Take a look at the following query.

CREATE TABLE tutorials_tbl (
   id INT NOT NULL,
   title VARCHAR(50) NOT NULL,
   author VARCHAR(20) NOT NULL,
   submission_date DATE,
   PRIMARY KEY (id) 
);

After execution of the above query, you will receive the following output −

(0) rows effected

HSQLDB – JDBC Program

Following is the JDBC program used to create a table named tutorials_tbl into the HSQLDB database. Save the program into CreateTable.java file.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class CreateTable {
   
   public static void main(String[] args) {
      
      Connection con = null;
      Statement stmt = null;
      int result = 0;
      
      try {
         Class.forName("org.hsqldb.jdbc.JDBCDriver");
         con = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost/testdb", "SA", "");
         stmt = con.createStatement();
         
         result = stmt.executeUpdate("CREATE TABLE tutorials_tbl (
            id INT NOT NULL, title VARCHAR(50) NOT NULL,
            author VARCHAR(20) NOT NULL, submission_date DATE,
            PRIMARY KEY (id));
         ");
			
      }  catch (Exception e) {
         e.printStackTrace(System.out);
      }
      System.out.println("Table created successfully");
   }
}

You can start the database using the following command.

\>cd C:\hsqldb-2.3.4\hsqldb
hsqldb>java -classpath lib/hsqldb.jar org.hsqldb.server.Server --database.0
file:hsqldb/demodb --dbname.0 testdb

Compile and execute the above program using the following command.

\>javac CreateTable.java
\>java CreateTable

After execution of the above command, you will receive the following output −

Table created successfully


Advertisements