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  • SQL server 数据库 ——聚合函数(一列 多行,值类型)

    聚合函数

    聚合函数:

    1、max最大值   select max(price) from car where code='c024'

    2、min最小值   select * from car where oil= (select min(price) from car) 

    3、avg平均值    select avg(price) as 平均价格  from car 

    4、sum求和    select sum (price) from car 

    5、count数量  select count (*) from car

    起别名:

      select avg(price) as 平均价格  from car

    1.select * from car oil in (7.4,8.5,8.6) 

    2.select * from car oil not in (7.4,8.5,8.6)

    3.select *from car where oil >=7 and oil <=8

    4.select * from car where oil between 7 and 8

    5.select *from car where oil >any(select oil from car where code='c024' or code ='c014')

    6.select * from car where oil >all(select oil from car where code='c024' or code ='c014')

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  • 原文地址:https://www.cnblogs.com/weiyu11/p/6541078.html
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