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如题 比如 a表是这样的
name number time 哈哈 23 2015-04-02 17:32:08 嘻嘻 44 呵呵 56 2015-04-16 17:32:08
用sql 语句要达到的效果是修改name字段的同时将time字段更新到当前时间 求大神指教
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update a set name="123", time=now()
Or directly set the time field to automatically update
You can use trigger. Set the trigger for the name field update event. create trigger update_time after update on a for each row set new.time=now();
time field type is set to timestamp current_timestamp
timestamp current_timestamp
Another method is to use ON UPDATE CURRENT_TIMESTAMP
ON UPDATE CURRENT_TIMESTAMP
If the database does not provide this function, you can use trigger as @drla said
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update a set name="123", time=now()
Or directly set the time field to automatically update
You can use trigger. Set the trigger for the name field update event.
create trigger update_time after update on a for each row set new.time=now();
time field type is set to
timestamp current_timestampAnother method is to use
in this field when creating the tableON UPDATE CURRENT_TIMESTAMPIf the database does not provide this function, you can use trigger as @drla said