在表中创建或更新行的 MySQL 过程 [英] MySQL procedure to create or update a row in a table

问题描述

我想编写一个 MySQL proc，它接受 userId 和 userName 并根据行是否插入或更新到表 users存在 users.userId = userId

I want to write a MySQL proc which takes userId and userName and does an insert or update into table users dependent on if a row exists where users.userId = userId

我在这里看到了一个类似的问题:MySql create or update row with ip?

I saw a similar question here: MySql create or update row with ip?

但我想在存储过程中执行此操作并想知道这是否提供任何其他工具?

But I want to do this in a stored procedure and wondered if that gives any additional tools?

推荐答案

你不需要存储过程，你可以使用INSERT ... ON DUPLICATE KEY UPDATE ....假设 userid 是 PRIMARY 或 UNIQUE 键，这将起作用:

You don't need a stored procedure, you can use INSERT ... ON DUPLICATE KEY UPDATE .... Assuming that userid is the PRIMARY or a UNIQUE key, this will work:

INSERT INTO user
SET 
userid = ?,
userName = ?
ON DUPLICATE KEY UPDATE
userName = VALUES(userName)

当然，如果需要，您可以将此查询包装在存储过程中:

Of course, you could wrap this query in a stored procedure if you want:

DROP PROCEDURE IF EXISTS set_user;

DELIMITER //

CREATE PROCEDURE set_user(
    IN i_userid INT UNSIGNED,
    IN v_userName VARCHAR(50)
)
DETERMINISTIC
MODIFIES SQL DATA
SQL SECURITY INVOKER
BEGIN
    INSERT INTO user
    SET 
    userid = i_userid,
    userName = v_userName
    ON DUPLICATE KEY UPDATE
    userName = VALUES(userName);
END;
//

DELIMITER ;

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