定时事件: DELIMITER $$ ALTER DEFINER=`root`@`%` EVENT `NewEvent` ON SCHEDULE EVERY 30 SECOND STARTS '2018-10-08 14:00:00' ON COMPLETION NOT PRESERVE ENABLE DO CALL update_a()$$ DELIMITER ; 储存过程随机数: DELIMITER $$ USE `figure`$$ DROP PROCEDURE IF EXISTS `update_a`$$ CREATE
