MySQL“更新时间戳"列-触发器 [英] MySQL 'Update Timestamp' Column - Trigger

问题描述

我正在向许多表中添加类型为DATETIME的列tsu(时间戳更新).

I'm adding a column tsu (timestamp update) of type DATETIME to a number of my tables.

我需要编写BEFORE UPDATE触发器，以将列更新为CURRENT_TIMESTAMP()，但是我做错了.尝试过:

I need to write BEFORE UPDATE triggers that will update the column to CURRENT_TIMESTAMP(), but I can't get it right. Tried:

DELIMITER $$
CREATE
    TRIGGER `cams`.`tsu_update_csi` BEFORE UPDATE
    ON `cams`.`csi`
    FOR EACH ROW BEGIN
        UPDATE csi SET tsu = CURRENT_TIMESTAMP WHERE csi_code = OLD.csi_code;
    END$$
DELIMITER ;

有人能指出我正确的方向吗? MTIA

Can anyone point me in the right direction pls? MTIA

推荐答案

好，尝试以下方法:

DELIMITER $$ CREATE  
    TRIGGER `cams`.`tsu_update_csi` BEFORE UPDATE  
    ON `cams`.`csi`  
      FOR EACH ROW BEGIN  
        SET NEW.tsu = CURRENT_TIMESTAMP;   
END$$ DELIMITER ;

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