Update Query in MySQL using Java PreparedStatement

In this article, we will learn how to update a record in a MySQL database table using the JDBC PreparedStatement interface.

As we know PreparedStatement interface improves performance like SQL statement is precompiled and stored in a PreparedStatement object. This object can then be used to efficiently execute this statement multiple times.

Java JDBC PreparedStatement Update a Record Example

In this example, we will use the users database table. Before updating a record to a database, Make sure that you need to first create a users table and insert some records in a database. 
In the following example, we will update the user name from "Ramesh" to "Ram":
package com.javaguides.jdbc.preparestatement.examples;

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

/**
 * Update PreparedStatement JDBC Example
 * @author Ramesh Fadatare
 *
 */
public class UpdatePStatementExample {

    private static final String UPDATE_USERS_SQL = "update users set name = ? where id = ?;";

    public static void main(String[] argv) throws SQLException {
        UpdatePStatementExample updateStatementExample = new UpdatePStatementExample();
        updateStatementExample.updateRecord();
    }

    public void updateRecord() throws SQLException {
        System.out.println(UPDATE_USERS_SQL);
        // Step 1: Establishing a Connection
        try (Connection connection = DriverManager
            .getConnection("jdbc:mysql://localhost:3306/mysql_database?useSSL=false", "root", "root");

            // Step 2:Create a statement using connection object
            PreparedStatement preparedStatement = connection.prepareStatement(UPDATE_USERS_SQL)) {
            preparedStatement.setString(1, "Ram");
            preparedStatement.setInt(2, 1);

            // Step 3: Execute the query or update query
            preparedStatement.executeUpdate();
        } catch (SQLException e) {

            // print SQL exception information
            printSQLException(e);
        }

        // Step 4: try-with-resource statement will auto close the connection.
    }

    public static void printSQLException(SQLException ex) {
        for (Throwable e: ex) {
            if (e instanceof SQLException) {
                e.printStackTrace(System.err);
                System.err.println("SQLState: " + ((SQLException) e).getSQLState());
                System.err.println("Error Code: " + ((SQLException) e).getErrorCode());
                System.err.println("Message: " + e.getMessage());
                Throwable t = ex.getCause();
                while (t != null) {
                    System.out.println("Cause: " + t);
                    t = t.getCause();
                }
            }
        }
    }
}

Output

References

https://www.javaguides.net/2018/10/jdbc-preparedstatement-update-record-example.html

Comments