dpxnrx11199 2011-02-10 23:46
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定时器触发数据库事件

Suppose I have a table with the current users logged in on my website. And if I there isn't any "activity" from one of his/her username in a time interval it would be deleted from the table.

What would be the easiest way to implement this functionality?

Besides using batch files or something like that.

I searched but database triggers can't be timed programmed, at least from what I gathered.

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  • ds000001 2011-02-10 23:52
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    Usually you would have something like this:

    • A table would have a column named something like last_activity which stores a timestamp of when the user last visited a page

    • You check via a query if a user has been active within a certain amount of time (ex: WHERE last_activity - current_time < 60 [active in the last minute])

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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