UPDATE users SET status = 'active' WHERE last_login > '2023-01-01';
-- 执行后会返回更新的行数

import mysql.connector

conn = mysql.connector.connect(user='user', password='password',
                              host='host', database='db')
cursor = conn.cursor()

update_query = "UPDATE products SET price = price * 1.1 WHERE category = 'electronics'"
cursor.execute(update_query)
updated_rows = cursor.rowcount
print(f"Updated {updated_rows} rows")

conn.commit()
conn.close()

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

public class UpdateExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydb";
        String user = "username";
        String password = "password";
        
        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            String sql = "UPDATE orders SET status = 'shipped' WHERE order_date < ?";
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setDate(1, java.sql.Date.valueOf("2023-01-01"));
            
            int rowsUpdated = pstmt.executeUpdate();
            System.out.println("Rows updated: " + rowsUpdated);
            
            conn.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

<?php
$dsn = 'mysql:host=localhost;dbname=testdb';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
    $sql = "UPDATE articles SET views = views + 1 WHERE id = :id";
    $stmt = $pdo->prepare($sql);
    $stmt->bindValue(':id', 123);
    $stmt->execute();
    
    $rowCount = $stmt->rowCount();
    echo "Updated $rowCount rows";
} catch (PDOException $e) {
    echo 'Error: ' . $e->getMessage();
}
?>

-- PostgreSQL示例
UPDATE accounts SET balance = balance - 100 WHERE id = 1 RETURNING *;