Autorunning Query in mysql

问题

Is it possible to make a stored procedure that run every night 11 pm , check in table if any record is modified for last six month, If some record is modified for last six month I have to delete it from table. This has to run automatically without use of any external language.

回答1:

CREATE EVENT IF NOT EXISTS `my_old_data_cleaner_event`
ON SCHEDULE EVERY 23 DAY_HOUR
COMMENT 'Clean up Service Start at 11:00PM daily!'
DO DELETE FROM my_table WHERE created_date < (NOW() - INTERVAL 1 MONTH);

OR for Stored Procedure.

CREATE EVENT IF NOT EXISTS `my_old_data_cleaner_event`
ON SCHEDULE EVERY 23 DAY_HOUR
DO CALL my_sp_cleanup_old_data();

回答2:

you can achieve with mysql event scheduler--

http://dev.mysql.com/doc/refman/5.1/en/events.html

detail blog: http://goo.gl/6Hzjvg

回答3:

Create an event like below

CREATE EVENT e_daily
  ON SCHEDULE
    EVERY 1 DAY
 DO
   BEGIN
     DELETE FROM tableA WHERE DATE(`yourtimestamp`) <(CURDATE() - INTERVAL 6 MONTHS);
  END 

回答4:

You can also write a script that processes your data in Python, Perl, PHP, etc.

After that, simply setup cron entry using crontab -e and add following line:

0 23 * * * /path/to/my/script.pl 2>&1 >/dev/null

If you don't specify 2>&1 >/dev/null, you will get email with execution results.

来源：https://stackoverflow.com/questions/13872598/autorunning-query-in-mysql