Question

我正在尝试获取子查询，该子查询将计算在特定时间段内向个人收取的案件数量。相反，当前版本报告在该时间段内计算的每个费用，而不仅仅是个人。如何修改以下查询以输出与每个BookedLastName关联的唯一tblCsCases.CauseNumber的计数？我需要BookedLastNames选择受一般WHERE by ChargeDescription，Statute和ChargeLanguage的限制，但同样的限制不应该应用于CrimeCount，只应受日期限制。

     System.out.printf("Hi %s. Let's practice addition!", name);

Answer 1

您需要将COUNT链接到BookedLastName / BookedFirstName（或标识某人的其他唯一标识符）。为此，您需要使用表别名或两个别名。因此，请尝试以下查询：

SELECT
     substring (Cases.FileNumber,4,6) AS [FileNumber]
    ,Charge.ChargeCode
    ,Cases.BookedLastName
    ,Cases.BookedFirstName
    ,(SELECT COUNT(c2.CauseNumber)
        FROM tblCsCases c2
        WHERE c2.IssuedDate >= @EndDate
            AND c2.IssuedDate <= GETDATE()
            AND c2.BookedLastName = Cases.BookedLastName
            AND c2.BookedFirstName = Cases.BookedFirstName
        ) AS CrimeCount
FROM tblCsCases as Cases
INNER JOIN tblCsCharge as Charge
    ON Cases.FileNumber = Charge.FileNumber
WHERE 
    Cases.IssuedDate >= @StartDate
    AND Cases.IssuedDate <= @EndDate
    AND Charge.Statute IN (N'571.030')
    AND Charge.ChargeDescription LIKE '%sub%'
    AND Charge.ChargeLanguage LIKE '%exhibit%'
ORDER By
    Cases.BookedLastName

日期范围内的SQL Count子查询报告所有结果，而不是单个结果

1 个答案: