T-SQL查詢計數相同列Multipe時間

Question

我是新來的SQL，我試圖建立一個SQL查詢針對SQL Server CE 4數據庫，基於數字同一列（CompanyName）Active狀態（0或1）。我需要「總計」，「主動」和「主動」狀態。我認爲這是一個針對Total，Active和In Active的子查詢，但我不確定如何構建它。

本質上，我想有一個表，將提供像這樣的結果基於CompanyName。

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

的基本查詢我至今是

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

任何幫助表示讚賞。

Answer 1

SUM在同一分組，使用CASE聲明：

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