计数SQL的百分比

你怎么能得到一个百分比的计数？当我试图根据行数计算百分比时，得到的值都是相同的。我希望每个属性都有一个百分比，具体取决于计数的多少。因此，如果我将一个属性计数30次，我希望根据行数和其他值将其更改为百分比

SELECT  Attribute
      , COUNT(Attribute) / COUNT(*) * 100 AS TopIssues
FROM    Audits 
        WHERE MONTH(TransActionDate) = MONTH(GETDATE())
GROUP BY Attribute
ORDER BY COUNT(Attribute) DESC     

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在SQL Server中，您可以使用：

SELECT  Attribute
      , COUNT(Attribute)*1.0 / SUM(COUNT(*)) OVER() * 100 AS TopIssues
FROM    Audits 
WHERE MONTH(TransActionDate) = MONTH(GETDATE())
GROUP BY Attribute
ORDER BY COUNT(Attribute) DESC   

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您也可以这样做：

SELECT  Attribute
      , COUNT(Attribute)*1.0 / ACount AS TopIssues
FROM    Audits 
CROSS JOIN (SELECT COUNT(1) ACount FROM Audits) ACount
WHERE MONTH(TransActionDate) = MONTH(GETDATE())
GROUP BY Attribute, ACount
ORDER BY COUNT(Attribute) DESC