更新：
CREATE TRIGGER `r_users_1` AFTER UPDATE ON `users` FOR EACH ROW update `wxusers` set status=NEW.status where wxusers.uid = new.id;
删除触发器：drop trigger r_users_1;
SQL创建触发器
原文：http://www.cnblogs.com/zrp2013/p/3522308.html
