获取表列中每个值的计数

Question

我正在使用SQL Server 2008，并且我有一个表中包含“状态”列。有五种可能的状态：已提交，正在进行，已删除，已实施，尚未实施。

我想弄清楚写一个SQL语句，将返回这些状态的每一个的计数，但我的代码要么返回数字状态，要么是特定状态的计数。这是我与合作：

SELECT  COUNT(ServiceAreaID) AS ServiceArea 
FROM   Suggestions 
WHERE  (ServiceAreaID = 6) 

或这一个

SELECT  COUNT(DISTINCT ServiceAreaID) AS ServiceArea 
FROM   Suggestions 

Answer 1

对于一个：

SELECT Status, COUNT(*) 
FROM dbo.Suggestions 
WHERE ServiceAreaID = 6 
GROUP BY Status; 

对于所有：

Answer 2

SELECT ServiceAreaID, COUNT(*) AS ServiceArea 
FROM Suggestions 
GROUP BY ServiceAreaID 

这应该给你一个每个服务区域ID的计数。用你的状态替换组中的服务区域id（如果需要的话，下面包括一个与serviceAreaID分开的状态列）。

SELECT ServiceAreaID, status, COUNT(*) AS count 
    FROM Suggestions 
    GROUP BY ServiceAreaID, status 

Answer 3

select ServiceAreaID,count(*),status 
from suggestion 
group by status,suggestion; 

Answer 4

我想你要寻找的是这样的：

SELECT ServiceAreaID, COUNT(ServiceAreaID) AS COUNT 
FROM Suggestions 
GROUP BY ServiceAreaID 

我没有看到你的SQL例子Status列，但万一有应该是一个，查询会更像这样：

这个答案基本上和Aaron是一样的，所以如果这是你要找的东西，一定要把Aaron标记为答案。

SELECT ServiceAreaID, Status, COUNT(*) AS COUNT 
FROM Suggestions 
GROUP BY ServiceAreaID, Status