Question

我正在尝试实现此查询，但我无法弄清楚为什么我没有得到结果。

以下是说明：

假设我有一个电话会议：TableAct

Acct#   Date                    WithdrawAmt         DepositAmt
!24455  2012-11-19-00.00.00 1245.77                 200.50
125577  2011-02-12-00.00.00 100.98                  578.00

另一张表TableCustomerOrd：

ID# COrder# CustID  Ord_Description  VendorType
124455  7712AS  123 1AAA             Permanent
125577  9914DL  346 1BBB             Partial 
...     UK1234  111 2HJ5             Permanent'
,,,     FR0912  567 5LGY             Partial

然后TableCustomerDtls：

CustID  Descriptions    Delivery    Address        ZipCode
123     1AAA_BLUESHARE  SUCCESSFUL  222 Main St 97002
346     1BBB_CHASE          DECLINE         40 West Side    97122
111     2HJ5_CITIBANK   SUCCESSFUL  …….         …….
567     5LGY_VANGURD    DECLINED        ----            -----

表DelivaryFlight：

   FlightOrder#   FlightCustID      FlightDt
   7712AS           123    2011-9-29-00.00.00
   9914DL           346    2010-11-2-00.00.00
   UK1234           111    2012-4-1-00.00.00
   FR0912           567    2012-9-11-00.00.00

我想在以下条件下更新TableAct：

TableAct. Acct# = TableCustomerOrd.ID#，AND：
TableCustomerOrd. CustID = TableCustomerDtls.CustID同时，TableCustomerOrd.Ord_Descriptions字段应与TableCustomerDtls. Descriptions字段匹配“_”之前的任何字段。因此‘1AAA’, ‘2HJ5’等AND：
DelivaryFlight.FlightOrder# = TableCustomerOrd.COrder#，AND：DelivaryFlight.FlightCustID = TableCustomerOrd. CustID。另外TableCustomerDtls. Delivery = ‘SUCCESSFUL’ AND：
```
 DelivaryFlight.FlightOrder# = TableCustomerOrd. COrder#
 AND DelivaryFlight.FlightCustID = TableCustomerOrd. CustID
 Also TableCustomerDtls. Delivery = ‘DECLINED 
```

然后我要比较：elivaryFlight.FlightDt > DelivaryFlight.FlightDt。

基本上我需要将表DelivaryFlight列FlightOrder#, FlightCustID与TableCustomerOrd匹配。

TableCustomerDtls Delivery列ck delivary ‘DECLINED’ ‘SUCCESSFUL’状态，例如‘SUCCESSFUL’ FlightDt。

‘DECLINED’ FlightDt条件并将Update Set … FROM TableAct AC Join TableCustomerOrd CustOd ON AC.Acct# = CustOd.ID# Join TableCustomerDtls CDtls ON CDtls. CustID = CustOd. CustID AND (CustOd.Ord_Descriptions = Left(CDtls.Descriptions, LEN(rtrim(CDtls.Descriptions)))) JOIN DelivaryFlight DF ON DF.FlightOrder# = CustOd.COrder# AND DF.FlightCustID = CustOd.CustID AND CDtls.Delivery = ‘SUCCESSFUL’ JOIN DelivaryFlight DF2 ON DF2.FlightOrder# = DF.COrder# AND DF2.FlightCustID = DF.CustID AND CDtls.Delivery = ‘DECLINED’ WHERE DelivaryFlight. FlightDt > DelivaryFlight. FlightDt AND DepositAmt > 100与{{1}}进行比较。

这是我的查询，但请帮助我理解，我相信这可以以更好的方式完成。

查询无效：

{{1}}

你的帮助将是巨大的'因为我的项目将在本周结束。谢谢你

Answer 1

如果我有这样的复杂查询，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）直接将（内部）连接到要更新的表并进行更新记忆以仅通过包括

来更新匹配的行

WHERE tblTobeUpdated.pk = SimpleSelect.pk

希望这有帮助

Answer 2

我没有时间深入研究这个问题，但我怀疑你至少想要解决这个问题：

  WHERE DelivaryFlight. FlightDt >  DelivaryFlight. FlightDt

这是一个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queires，更新能够查看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，直到我确定选择要选择的记录并且值为值时才测试更新我将替换是正确的。

Answer 3

尝试打破你的查询，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

如何实现具有多个连接条件的SQL Server查询

3 个答案: