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3 回答 3

0

我没有时间深入研究这个问题，但我怀疑你至少想要修复：

  WHERE DelivaryFlight. FlightDt >  DelivaryFlight. FlightDt

这是永远无法满足的条件。

你可能想要：

  WHERE DF. FlightDt > DF2. FlightDt

对于这些复杂的查询来说，更新能够看到将要更新的记录也很有用，所以我通常会这样做：

Update
     Set …
--Select *
    FROM TableAct AC

然后，我没有运行更新，而是只运行突出显示并运行以 select 开头的部分以查看结果，并且在我确定我正在选择我想要选择的记录并且我将成为的值之前不要测试更新更换是正确的。

于 2012-12-11T20:05:38.810 回答
0

试着分解你的查询，这是我今天写的一个查询，分别测试每个部分 

SELECT
    Employee
    , Reference
    , Payroll
    , [Hours] / 60 
    [Hours]
    , [Days]
FROM
    (
    SELECT
        Employee
        , Reference
        , Payroll
        , SUM( Duration ) AS [Hours]
        , AvailableID
    FROM
        (
        SELECT
            RequirerID
            , Duration
            , RTRIM( COALESCE(MA.MemberLastName, '') 
                + ' ' + COALESCE(MA.MemberFirstName, '')  
                + ' ' + COALESCE(MA.MemberInitial, '')) Employee
            , COALESCE(MA.Detailref1, '') Reference
            , COALESCE(MA.PayrollRef, '') Payroll
            , Available.AvailableId 
        FROM
            (
            SELECT DISTINCT
                RequirerID
                , ShiftDate
                , CAST(ShiftStart - ShiftEnd - ShiftBreak AS DECIMAL(19,2)) ShiftDuration
                , Id RequirementRecordID
            FROM
                Requirements
            WHERE
                Requirements.ShiftDate BETWEEN @ParamStartDate
                AND @ParamEndDate
                AND RequirerID IN (SELECT ID FROM MemberDetails WHERE CompanyID = @ParamCompanyID)
            )
            R
            INNER JOIN
            ShiftConfirmed
            INNER JOIN
            Available
            INNER JOIN
            MemberDetails MA
            ON Available.AvailableID = MA.ID
            ON ShiftConfirmed.AvailableRecordID = Available.ID
            ON R.RequirementRecordID = ShiftConfirmed.RequirementRecordID
        WHERE
            R.ShiftDate BETWEEN @ParamStartDate
            AND @ParamEndDate
            AND COALESCE(ShiftChecked, 0) BETWEEN 0 AND 1
        )
        ShiftDay
    Group By
        Employee
        , Reference
        , Payroll
        , AvailableId
    ) Shifts
    INNER JOIN
    (
    SELECT
        COUNT( * ) AS [Days]
        , AvailableID
    FROM
        (
        SELECT DISTINCT
            R.ShiftDate
            , Available.AvailableId 
        FROM
            (
            SELECT DISTINCT
                ShiftDate
                , Id RequirementRecordID
            FROM
                Requirements
            WHERE
                Requirements.ShiftDate BETWEEN @ParamStartDate
                AND @ParamEndDate
                AND RequirerID IN (SELECT ID FROM MemberDetails WHERE CompanyID = @ParamCompanyID)
            )
            R
            INNER JOIN
            ShiftConfirmed
            INNER JOIN
            Available
            INNER JOIN
            MemberDetails MA
            ON Available.AvailableID = MA.ID
            ON ShiftConfirmed.AvailableRecordID = Available.ID
            ON R.RequirementRecordID = ShiftConfirmed.RequirementRecordID
        WHERE
            R.ShiftDate BETWEEN @ParamStartDate
            AND @ParamEndDate
            AND COALESCE(ShiftChecked, 0) BETWEEN 0 AND 1
        )
        ShiftDay
    Group By
        AvailableId
    ) D
    ON Shifts.AvailableID = D.AvailableID

WHERE [Hours] > 0
ORDER BY
    Employee
于 2012-12-13T09:14:14.653 回答
0

如果我有这样一个复杂的查询，我首先创建一个“简单”选择，它只生成要更新的行。

它还应该返回更新值和更新表的 pk

然后（相对）直接（内部）将它与要更新的表连接起来，并通过包括

WHERE tblTobeUpdated.pk = SimpleSelect.pk

希望这可以帮助

于 2012-12-11T17:11:34.560 回答