php - 多个 PHP MySQL 更简单的查询与一个更复杂的查询，

Question

我应该使用 PHP 执行单个更复杂的 MySQL 查询还是多个更简单的查询？

例如

更简单的查询:

UPDATE image SET profile = 0 WHERE user_id = 1;

UPDATE image SET profile = 1 WHERE user_id = 1 AND id = 10;

一个更复杂的查询:

UPDATE image
    SET profile = CASE id WHEN 10 THEN 1 ELSE 0 END
    WHERE user_id = 1;

1:什么是最快最有效的？

2:什么被认为是最佳实践或首选方法？

Answer 1

单个查询是最快和最有效的

Besides the IF statement, MySQL also provides an alternative conditional statement called MySQL CASE. The MySQL CASE statement makes the code more readable and efficient. See more details... http://www.mysqltutorial.org/mysql-case-statement/