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JDBC PreparedStatement deletes a record example


The JDBC PreparedStatement is used to execute parameterized queries against the database. Let us study JDBC PreparedStatement by deletes a record example.

Example:

JDBCTest.java

import java.sql.Connection;
import java.sql.PreparedStatement;
import com.codesjava.util.JDBCUtil;
 
/**
 * This class is used to delete a record from DB table
 * using PreparedStatement.
 * @author codesjava
 */
public class JDBCTest {
	public static void main(String args[]){
		Connection conn = null;
		PreparedStatement preparedStatement = null;
 
		String query = "delete EMPLOYEE " + 
		"where EMPLOYEE_ID = 1 ";
 
		try{
			//get connection
			conn = JDBCUtil.getConnection();
 
			//create preparedStatement
			preparedStatement = conn.prepareStatement(query);
 
			//execute query
			preparedStatement.executeUpdate();
 
			//close connection
			preparedStatement.close();
			conn.close();
 
		     System.out.println("Record deleted successfully.");
		}catch(Exception e){
			e.printStackTrace();
		}
	}	
}

JDBCUtil.java

import java.sql.Connection;
import java.sql.DriverManager;
 
/**
 * This is a utility class for JDBC connection.
 * @author codesjava
 */
public class JDBCUtil {
	//JDBC and database properties.
	private static final String DB_DRIVER = 
		           "oracle.jdbc.driver.OracleDriver";
	private static final String DB_URL = 
		        "jdbc:oracle:thin:@localhost:1521:XE";
	private static final String DB_USERNAME = "system";
	private static final String DB_PASSWORD = "oracle";
 
	public static Connection getConnection(){
		Connection conn = null;
		try{
			//Register the JDBC driver
			Class.forName(DB_DRIVER);
 
			//Open the connection
			conn = DriverManager.
			getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
 
			if(conn != null){
			   System.out.println("Successfully connected.");
			}else{
			   System.out.println("Failed to connect.");
			}
		}catch(Exception e){
			e.printStackTrace();
		}
		return conn;
	}	
}

Output:

Successfully connected.
Record deleted successfully.

Download this example.
 
Next Topic: JDBC PreparedStatement batch update example.
Previous Topic: JDBC PreparedStatement select records example.

Related Topics:

JDBC PreparedStatement creates a table example.
JDBC PreparedStatement inserts a record example.
JDBC PreparedStatement updates a record example.
JDBC PreparedStatement select records example.
JDBC PreparedStatement deletes a record example.
JDBC PreparedStatement batch update example.

 

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