30秒后执行
waitfor delay '00:00:30'
select * from Announcement
晚上11点备份数据库 northwind
waitfor time '23:00'
backup datebase northwind to FLY.bak
waitfor delay '00:00:30'
select * from Announcement
晚上11点备份数据库 northwind
waitfor time '23:00'
backup datebase northwind to FLY.bak