sendtime 字段 datetime类型
更新语句:update QuizActivity set title='a',startTime='2007-11-4 0:00:00',finishTime='2007-11-4 0:00:00',attendDept='网络部",attemdStudents='张三',subjectID=15,sendTime=null,principal='',stateId=1,sendMode='短信' where activityID=31
插入语句:insert into QuizActivity(title,startTime,finishTime,attendDept,attemdStudents,subjectID,sendTime,principal,stateID,sendMode) values('测试','2007-11-4 0:00:00','2007-11-4 0:00:00','网络部','李四',15,null,'',1,'语音')