SQL高级查询：嵌套和分页

2023年12月23日 215次阅读 来源: Monodrama

1.嵌套子查询

--查询最近一次oop考试没有参加考试的学生
select StudentName from Student
where StudentNo not in(
select StudentNo from Result
where SubjectId=(
select SubjectId from Subject where SubjectName='oop'
)
and ExamDate=(
select MAX(ExamDate) from Result where SubjectId=
(select SubjectId from Subject where SubjectName='oop'
     )
  )
)

2.相关子查询

SElECT name,id,price
  FROM commodity As c
  WHERE  price>
  (
    SELECT AVG(price)
    FROM commodity AS a
    WHERE c.类编号=a.类编号
  )

3.分页查询

第一种:

--跳过五行取两行
select top 2 * from Student
where StudentNo not in
(
  select top 5 StudentNo from Student
  order by StudentNo
)
order by StudentNo

第二种：

--取第四行到第六行
select * from
(select *,ROW_NUMBER() over(order by StudentNo) as myid 
from Student) as temp
where myid between 4 and 6

 

    原文作者：Monodrama
    原文地址: https://www.cnblogs.com/jingpeipei/p/5263040.html
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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