JDBC PreparedStatement example to Delete a record

 
In this example let us learn how to delete a record from a table via JDBC PreparedStatement.
 
To issue a delete statement, calls the PreparedStatement.executeUpdate() as show below
 

String deleteQuery = "DELETE EMPLOYEE WHERE USER_ID = ?";
PreparedStatement preparedStatement = connection.prepareStatement(deleteQuery);
preparedStatement.setInt(1, 1000);
// execute delete SQL statement
preparedStatement.executeUpdate();

 
Full example…
 

package com.simplecode.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JDBCPreparedStmtDeleteExample
{

private static final String dbDriver = "oracle.jdbc.driver.OracleDriver";
private static String serverName = "127.0.0.1";
private static String portNumber = "1521";
private static String sid = "XE";
private static final String dbUrl = "jdbc:oracle:thin:@" + serverName + ":"
		+ portNumber + ":" + sid;
private static final String dbUser = "system";
private static final String dbPassword = "admin";

public static void main(String[] argc)
{
	try
	{
		deleteRecordFromTable();
	}
	catch (SQLException e)
	{
		System.out.println(e.getMessage());
	}
}

private static void deleteRecordFromTable() throws SQLException
{
	Connection connection = null;
	PreparedStatement prepareStmt = null;
	String deleteQuery = "DELETE EMPLOYEE WHERE USER_ID = ?";
try
{
	connection = getDBConnection();
	prepareStmt = connection.prepareStatement(deleteQuery);
	prepareStmt.setInt(1, 1000);
	// execute update SQL statement
	prepareStmt.executeUpdate();
	System.out.println("Record is deleted!");
}
catch (SQLException e)
{
	System.err.println(e.getMessage());
}
	
finally
{
	if (prepareStmt != null)
	{
		prepareStmt.close();
	}
	if (connection != null)
	{
		connection.close();
	}
	}
}

private static Connection getDBConnection()
{
	Connection dbConnection = null;
	try
	{
		Class.forName(dbDriver);
	}
	catch (ClassNotFoundException e)
	{
		System.err.println(e.getMessage());
	}

	try
	{
	dbConnection = DriverManager.getConnection(dbUrl, dbUser, dbPassword);
	return dbConnection;
	}
	catch (SQLException e)
	{
		System.err.println("Db "+e.getMessage());
	}
	return dbConnection;
}
}