Question

我是SQL的新手，我正在尝试针对SQL Server CE 4数据库构建SQL查询，该数据库基于其CompanyName状态（0或0）多次计算同一列（Active） 1）。我需要按状态计算的Total，Active和In Active。我认为这是Total，Active和In Active的子查询，但我不确定如何构建它。

基本上我想要一个基于CompanyName提供这样结果的表。

State     Total Active InActive
Texas      10     6       4 
Florida    15     5       10

我到目前为止的基本查询是

SELECT State, COUNT(CompanyName) AS Total
FROM  JobApps AS j
GROUP BY State
ORDER BY Total DESC

感谢任何帮助。

Answer 1

SUM使用CASE语句在同一分组上：

SELECT State, COUNT(CompanyName) AS Total
, SUM(CASE Active WHEN 1 THEN 1 ELSE 0 END) AS Active
, SUM(CASE Active WHEN 1 THEN 0 ELSE 1 END) AS InActive
FROM  JobApps AS j
GROUP BY State
ORDER BY Total DESC

T-SQL查询多次计算同一列

1 个答案: