Question

我有三张桌子

数据服务状态

数据表

Serno | ServiceId | Status |    Datetime
1         2           4        12/12/2014
2         1           3        08/12/2014

服务

ServiceId |  Service Name 
  1             Deployment
  2             Designing

状态

StatusId   |  Status
 1           Done
 2           Pending
 3           20%done
 4           Canceled

我想要一个Count的Sql代码（这是关于服务的状态计数）

Designing  0  0  0  1
Deployment 0  0  1  0

我试过这个

SELECT     COUNT(Service.Status) AS Expr1, Service.ServiceName, Status.Status
FROM         Data INNER JOIN
                      Service ON Hcc_Service_Data.Hcc_Service_Category_Id = Service .ServiceId INNER JOIN
                       Status ON  Data.StatusId = Status.Status_Serno
GROUP BY Service.ServiceName, Status.Status

Answer 1

Select S.ServiceName, 
(CASE WHEN D.Status=1 then '1' ELSE '0' END) as S1,
(CASE WHEN D.Status=2 then '1' ELSE '0' END) as S2,
(CASE WHEN D.Status=3 then '1' ELSE '0' END) as S3,
(CASE WHEN D.Status=4 then '1' ELSE '0' END) as S4
FROM Data D, Service S where
D.serviceId = S.serviceId;

在三个表之间计数

1 个答案: