聚合函数+模糊查询
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--聚合函数 select SUM(age)as 总和 from dbo.student select AVG(age) 平均 from dbo.student select max(age) 最大 from dbo.student select min(age) 最小 from dbo.student select count(*) 数量 from dbo.student --模糊查询 select * from dbo.student where age IS null--查unll select * from dbo.student where age IS not null --查非空 select * from dbo.student where address like '你%'--模糊查询 select * from dbo.student where stuID between 2 and 4 select * from dbo.student where address in ('你妹','11') (编辑:安卓应用网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |
