HSQLDB - Drop Table


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It is very easy to drop an existing HSQLDB table. However, you need to be very careful while deleting any existing table as any data lost will not be recovered after deleting a table.

Syntax

Following is a generic SQL syntax to drop a HSQLDB table.

DROP TABLE table_name;

Example

Let us consider an example to drop a table named employee from the HSQLDB server. Following is the query to drop a table named employee.

DROP TABLE employee;

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 drop the table employee from the HSQLDB server.

Save the following code into DropTable.java file.

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

public class DropTable {
   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("DROP TABLE employee");
      }catch (Exception e) {
         e.printStackTrace(System.out);
      }
      
      System.out.println("Table dropped 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 DropTable.java
\>java DropTable

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

Table dropped successfully


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