SQL SERVER常用的统计用法

--查询各个状态下总数
SET statistics time on
Go
SELECT 
sum(CASE WHEN [Status] =-1 THEN 1 ELSE 0 END ) AS Q1,
sum(CASE WHEN [Status] =0 THEN 1 ELSE 0 END ) AS Q2,
sum(CASE WHEN [Status] =1 THEN 1 ELSE 0 END ) AS Q3,
sum(CASE WHEN [Status] =2 THEN 1 ELSE 0 END ) AS Q4,
sum(CASE WHEN [Status] =3 THEN 1 ELSE 0 END ) AS Q5,
sum(CASE WHEN [Status] =4 THEN 1 ELSE 0 END ) AS Q6,
sum(CASE WHEN [Status] =5 THEN 1 ELSE 0 END ) AS Q7
FROM OrderInfo
GO
set statistics time off