Question

如何将计数除以另一个计数。我见过几种不同的方法，但我无法让它们为我的目的而工作。我目前正在处理的代码是：

Select(select COUNT(lUsers) 
        FROM Tlocation
        WHERE dLastUpdated IS NOT NULL 
            AND dRemovalDate BETWEEN DATEADD(day,-7,GETDATE()) and GETDATE())
                /
            (SELECT COUNT(lUsers) 
        FROM Tlocation 
        WHERE dLastUpdated < GETDATE() 
            AND dRemovalDate IS NULL OR dRemovalDate > GETDATE())

但每次只返回0。

Answer 1

因为该值小于INT（COUNT（）返回）。以下是如何做到的：

SELECT
    (
        SELECT 1562 
    )
    /
    CAST(
        (
            SELECT 92825
        )
        AS DECIMAL(20, 10)
    )
;

或者您的查询：

Select(select COUNT(lUsers) 
        FROM Tlocation
        WHERE dLastUpdated IS NOT NULL 
            AND dRemovalDate BETWEEN DATEADD(day,-7,GETDATE()) and GETDATE())
                /
            CAST(
                    (SELECT COUNT(lUsers) 
                FROM Tlocation 
                WHERE dLastUpdated < GETDATE() 
                    AND dRemovalDate IS NULL OR dRemovalDate > GETDATE())
            AS DECIMAL(20, 10)
            )
;

计数除以计数

1 个答案: