sql查询语句
select version as 版本 from cbas_eventdata; 所有
select DISTINCT version as 版本 from cbas_eventdata; 去重
select DISTINCT min( version) as 版本 from cbas_eventdata; 取最小
select count(DISTINCT VERSION) as 版本种类总数 FROM cbas_eventdata ; 版本总类总数
select DISTINCT version as 版本 from cbas_eventdata ORDER BY 版本 ; 结果升序
select DISTINCT version as 版本 from cbas_eventdata ORDER BY 版本 DESC ; 结果降序
这列的总数：
SELECT count() from cbas_eventdata where version like '%%';
SELECT count() from cbas_eventdata where version is not NULL;
SELECT count(DISTINCT version) from cbas_eventdata;
select count(*) FROM cbas_eventdata where clientdate < '2017-04-17 '; 查询4月17前的个数
select from moncenter.dbo.wt_login_transmid where version = 'I037.08.146.1.13.0' or version = 'G037.08.55.1.32.9.00' 列出这两个版本的所有信息
select count() as 版本 from moncenter.dbo.wt_login_transmid where version = 'I037.08.146.1.13.0' or version = 'G037.08.55.1.32.9.00' 以版本为列标题统计这两个版本的数量
select count(distinct version) as 版本 from moncenter.dbo.wt_login_transmid where version = 'I037.08.146.1.13.0' or version = 'G037.08.55.1.32.9.00' 以版本为列标题统计这两个版本去重后的数量（肯定就是2）
select distinct dlzh from moncenter.dbo.wt_login_transmid where exists
(select * from moncenter.dbo.wt_login_transmid where version = 'I037.08.146.1.13.0' or version = 'G037.08.55.1.32.9.00' ) 列出这两个版本的登陆账户，去重列出，用到嵌入查询exists
select distinct phone as 手机号 ,dlzh as 登陆账户
from moncenter.dbo.wt_login_transmid where exists
(select * from moncenter.dbo.wt_login_transmid where version = 'I037.08.146.1.13.0' or version = 'G037.08.55.1.32.9.00' ) 列出这两个版本的登陆账户及手机号，手机号和登陆账户关联去重，用到嵌入查询exists
查询年薪高于奖金10倍的所有人信息：
selelct from userinfo where nx > jj10;
转载于:https://blog.51cto.com/12346621/2154658