sql server 常用的查询语句

最近在加强sql 语句的学习，整理一下基本语法，现在记录下

select * from dbo.cangku where city='河南'

select  distinct(city), cangkuId from dbo.cangku    //取消重复的列值

select  SUM (gongzi) as  zgz  from dbo.zhigong    //总工资

select cangkuId ,city  from dbo.cangku   where not city='河南'   //不等于

select * from zhigong where gongzi  between 1000  and 1500   //between 在什么。。。之间

select * from zhigong where  xingbie  in('男')    // 包含in

select * from zhigong where xingbie   is null   //不为空

select * from zhigong where xiangming like '%金%'     //%代表多个字符

select * from zhigong where  xiangming   like '_金_'     //下划线代表一个字符

select top 10 * from  dbo.zhigong   //查询前10条数据

select * from zhigong order by  ID   //按id排序

select * from zhigong order by NEWID()    //NEWID() 随机排序

select  avg (gongzi) as 平均工资  from dbo.zhigong   //平均值

select  max(gongzi) as 最高工资 from dbo.zhigong   //最大值

select  min (gongzi)as 最低工资 from dbo.zhigong   //最小值

select  count (*) as  zs from dbo.zhigong   //记录总数

select COUNT (distinct(cangkuId)) as zs from  cangku    //去除重复的总数

select MAX (gongzi)-MIN (gongzi)as   chage from zhigong   //工资差

select cangkuId,max(gongzi) as 不同仓库的最高工资  from zhigong group by  cangkuId    //查询不同仓库的最高工资

select cangkuId,AVG (gongzi) as 不同仓库的平均工资 from zhigong group by cangkuId  having AVG (gongzi) >1000    //查询不同仓库的平均工资

select cangkuId,xingbei,MIN (gongzi) as 不同仓库的最低工资  from zhigong group by cangkuId,xingbei   //查询不同仓库的最低工资

select name,SUBSTRING(name,1,1) as 姓氏, SUBSTRING (name,2,2) as 名字 from zhigong   //SUBSTRING 截取

select cangkuId,UPPER(cangkuId) as 仓库号大写  from cangkuId   //转换大写

select cangkuId,LOWER (cangkuId) as 仓库号小写  from cangkuId  //转换小写

select cangkuId,CONVERT(char(10),createTime,111) as createTime  from cangku   //111代表日期格式 yy/mm/dd