taizhen/blog

一对一 <mapper namespace="dao.mapper.ClassMapper">       <resultMap id="classResultMap" type="Classes">         <id property="classid" column="classid1" />         <result

直接上例子： CREATE TRIGGER myTrigger2 AFTER update  on t_alert FOR EACH ROW BEGIN DECLARE alert_ids INT; DECLARE alert_infos text; DECLARE statuss char(225); set alert_ids=OLD.id; set  alert_infos