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JDBC PreparedStatement example to Delete a record

drop table
 
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;
}
}

 

About Mohaideen Jamil


I'm a Full stack developer of IT exp in J2EE, AngularJs, MicroServices, Docker, Spring (Boot, MVC, Cloud), Bluemix, DevOps. Follow me on Facebook or Google Plus. If you like my tutorials, consider making a donation to this charity, thanks.

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