跟踪sql server数据库后,发现后台在不停的执行sp_unprepare语句,请问各位高手是怎么回事啊? sp_unprepare表示:放弃由 sp_prepare 存储过程创建的执行计划。是不是哪个表死锁了,或是SQL写的不规范?
数据库 sql语句查询 (1)学生信息表Smdents(sno,sname);(2)运动对信息表sports(spno,spname);(3)参加运动队情况表Attending(sno,spno,item—参加运动项目,score)。求:①select sno,sname,scorefrom Smdents,sports,Attendingwhere item=('轮滑' and '羽毛球')and Attending.spno=sports.spno and Attending.sno=Smdents.snogroup by sno,sname,score②select snamefrom Smdents,sports,Attendingwhere spname=(select spname from Smdents,sports,Attendingwhere Attending.spno=sports.spno and Attending.sno=Smdents.sno and sname='李磊')and Attending.spno=sports.spno and Attending.sno=Smdents.sno③ select sname,count(item)as 项目总数from Smdents,sports,Attendingwhere Attending.spno=sports.spno and Attending.sno=Smdents.sno and score>;=85group by snamehaving count(item)>;=3以上在sql上运行,专业数据库问题回答户,楼主请采纳!我刚考完数据库回来的,这些熟悉的不能再熟悉了!
关于数据库SQL语句的查询 select deptclass_three,count(*)duty_grade_num from table where deptclass_two='校机关' and duty_grade='正厅级' group by deptclass_threeq求出结果是校机关-正厅级中每个存在的deptclass_three所对应的人数,应该一个人一行吧。