数据库复习总结（15）-子查询（分页）

use  dbtest
select * from StudentInfo 
select * from ScoreInfo
select stuid from ScoreInfo

--查询参与了考试的学生信息 exists in
select * from StudentInfo
where sId in(select distinct stuid from ScoreInfo)

select * from StudentInfo
where exists 
(select * from ScoreInfo where ScoreInfo.stuId=StudentInfo.sid)

select *,
ROW_NUMBER() over(order by sid desc) as rowIndex
from StudentInfo

--分页 已知:页大小(一页显示多少条数据),页索引
--            3,4                        1,2,3,4
--1,3   1,3        (pageIndex-1)*pageSize+1    pageIndex*pageSize
--2,3    4,6
--3,3    7,9
--4,3    10,12

--2,4    5,8
select * from
(select *,
ROW_NUMBER() over(order by sid desc) as rowIndex
from StudentInfo) as t1
where rowindex between 5 and 8