Question

我有一点看起来像这样的SQL。

UPDATE TBL_FR2052A_TPOS_HIST_SPLIT
SET PRINCIPAL = CASE 
                   WHEN TPOS.PID = 'O.D.7' THEN TPOS.MKTVAL 
                   WHEN TPOS.PID = 'I.A.1' THEN TPOS.MKTVAL
                   WHEN TPOS.PID = 'I.O.8' THEN TPOS.PRINAMT 
                END, 
    INTEREST = CASE 
                  WHEN TPOS.PID = 'O.O.19' THEN TPOS.QTY * SECS.INTPAYAMT_8 
                  WHEN TPOS.PID = 'I.O.6' THEN (TPOS.QTY * SELECT(MAX(SECS.INTPAYAMT_8))) 
               END,
    INTPAYAMTQTY = CASE 
                      WHEN TPOS.PID = 'O.W.16' THEN TPOS.MKTVAL + (TPOS.QTY*SECS.INTPAYAMT_8) 
                   END, 
    REPORTABLE_AMOUNT = CASE 
                           WHEN TPOS.PID = 'O.D.7' THEN TPOS.MKTVAL 
                           WHEN TPOS.PID = 'I.A.1' THEN TPOS.MKTVAL
                           WHEN TPOS.PID = 'I.O.8' THEN TPOS.PRINAMT
                           WHEN TPOS.PID = 'O.O.19' THEN TPOS.QTY * SECS.INTPAYAMT_8
                           WHEN TPOS.PID = 'I.O.6' THEN (TPOS.QTY * SELECT(MAX(SECS.INTPAYAMT_8)))
                           WHEN TPOS.PID = 'O.W.16' THEN TPOS.MKTVAL + (TPOS.QTY*SECS.INTPAYAMT_8)
                        END
FROM TBL_FR2052A_RAW_DATA_HIST AS RawData 
INNER JOIN TBL_FR2052A_SECS_HIST AS SECS 
INNER JOIN TBL_FR2052A_TPOS_HIST_SPLIT AS TPOS ON SECS.SECID = TPOS.SECID 
                                               AND SECS.ASOFDATE = TPOS.ASOFDATE 
      ON RawData.SourceID_Revised = TPOS.SourceID_Revised 
      AND RawData.AsofDate = TPOS.ASOFDATE

现在，我正试图获得SECS.INTPAYAMT_8

的最大值

我认为会是这样的：

WHEN TPOS.PID = 'I.O.6' THEN (TPOS.QTY * MAX(SECS.INTPAYAMT_8)) END,

当然，这不起作用。我在线查看，它说你必须使用子查询。我尝试了一些想法，但到目前为止没有任何效果。

这里有专家知道怎么做这种事吗？ TIA。

Answer 1

在加入SECS之前，首先计算MAX（SECS.INTPAYAMT_8）。

所以代码如下所示（您需要根据您的架构优化代码）：

UPDATE       TBL_FR2052A_TPOS_HIST_SPLIT
SET          PRINCIPAL = CASE WHEN TPOS.PID = 'O.D.7' THEN TPOS.MKTVAL 
                WHEN TPOS.PID = 'I.A.1' THEN TPOS.MKTVAL
                WHEN TPOS.PID = 'I.O.8' THEN TPOS.PRINAMT END, 
             INTEREST = CASE WHEN TPOS.PID = 'O.O.19' THEN TPOS.QTY * SECS.INTPAYAMT_8 
                WHEN TPOS.PID = 'I.O.6' THEN (TPOS.QTY * MAX_INTPAYAMT_8) END,
             INTPAYAMTQTY = CASE WHEN TPOS.PID = 'O.W.16' THEN TPOS.MKTVAL + (TPOS.QTY*SECS.INTPAYAMT_8) END,   
             REPORTABLE_AMOUNT = CASE WHEN TPOS.PID = 'O.D.7' THEN TPOS.MKTVAL 
                WHEN TPOS.PID = 'I.A.1' THEN TPOS.MKTVAL
                WHEN TPOS.PID = 'I.O.8' THEN TPOS.PRINAMT
                WHEN TPOS.PID = 'O.O.19' THEN TPOS.QTY * SECS.INTPAYAMT_8
                WHEN TPOS.PID = 'I.O.6' THEN (TPOS.QTY * MAX_INTPAYAMT_8)
                WHEN TPOS.PID = 'O.W.16' THEN TPOS.MKTVAL + (TPOS.QTY*SECS.INTPAYAMT_8)END
FROM         TBL_FR2052A_RAW_DATA_HIST AS RawData INNER JOIN
             (
             select *, 
             -- Calculate out MAX_INTPAYAMT_8
             max(INTPAYAMT_8) over (partition by ID) MAX_INTPAYAMT_8  --I do not know your schema, so use partiion by ID
                 from TBL_FR2052A_SECS_HIST
             )
 AS SECS INNER JOIN TBL_FR2052A_TPOS_HIST_SPLIT AS TPOS ON SECS.SECID = TPOS.SECID AND 
             SECS.ASOFDATE = TPOS.ASOFDATE ON RawData.SourceID_Revised = TPOS.SourceID_Revised AND 
             RawData.AsofDate = TPOS.ASOFDATE

Answer 2

或者，在单独的子查询中获取INTPAYAMT_8的最大值，然后将其加入主查询。

;WITH CTE
AS (
    SELECT CASE 
            WHEN TPOS.PID = 'O.D.7'
                THEN TPOS.MKTVAL
            WHEN TPOS.PID = 'I.A.1'
                THEN TPOS.MKTVAL
            WHEN TPOS.PID = 'I.O.8'
                THEN TPOS.PRINAMT
            END PRINCIPAL_, CASE 
            WHEN TPOS.PID = 'O.O.19'
                THEN TPOS.QTY * SECS.INTPAYAMT_8
            WHEN TPOS.PID = 'I.O.6'
                THEN (TPOS.QTY * T.INTPAYAMT_8)
            END INTEREST_, CASE 
            WHEN TPOS.PID = 'O.W.16'
                THEN TPOS.MKTVAL + (TPOS.QTY * SECS.INTPAYAMT_8)
            END INTPAYAMTQTY_, CASE 
            WHEN TPOS.PID = 'O.D.7'
                THEN TPOS.MKTVAL
            WHEN TPOS.PID = 'I.A.1'
                THEN TPOS.MKTVAL
            WHEN TPOS.PID = 'I.O.8'
                THEN TPOS.PRINAMT
            WHEN TPOS.PID = 'O.O.19'
                THEN TPOS.QTY * SECS.INTPAYAMT_8
            WHEN TPOS.PID = 'I.O.6'
                THEN (TPOS.QTY * T.INTPAYAMT_8)
            WHEN TPOS.PID = 'O.W.16'
                THEN (TPOS.MKTVAL + (TPOS.QTY * SECS.INTPAYAMT_8))
            END REPORTABLE_AMOUNT_, PRINCIPAL, INTEREST, INTPAYAMTQTY, REPORTABLE_AMOUNT
    FROM TBL_FR2052A_RAW_DATA_HIST AS RawData
    INNER JOIN TBL_FR2052A_TPOS_HIST_SPLIT AS TPOS ON (
            RawData.SourceID_Revised = TPOS.SourceID_Revised
            AND RawData.AsofDate = TPOS.ASOFDATE
            )
    INNER JOIN TBL_FR2052A_SECS_HIST AS SECS ON (
            SECS.SECID = TPOS.SECID
            AND SECS.ASOFDATE = TPOS.ASOFDATE
            )
    LEFT OUTER JOIN (
        SELECT RawData.SourceID_Revised, TPOS.ASOFDATE, MAX(SECS.INTPAYAMT_8) INTPAYAMT_8
        FROM TBL_FR2052A_RAW_DATA_HIST AS RawData
        INNER JOIN TBL_FR2052A_TPOS_HIST_SPLIT AS TPOS ON (
                RawData.SourceID_Revised = TPOS.SourceID_Revised
                AND RawData.AsofDate = TPOS.ASOFDATE
                )
        INNER JOIN TBL_FR2052A_SECS_HIST AS SECS ON (
                SECS.SECID = TPOS.SECID
                AND SECS.ASOFDATE = TPOS.ASOFDATE
                )
        GROUP BY RawData.SourceID_Revised, TPOS.ASOFDATE
        ) T ON RawData.SourceID_Revised = T.SourceID_Revised
        AND RawData.AsofDate = T.ASOFDATE
    )
UPDATE CTE
SET PRINCIPAL = PRINCIPAL_, INTEREST = INTEREST_, INTPAYAMTQTY = INTPAYAMTQTY_, REPORTABLE_AMOUNT = REPORTABLE_AMOUNT_

不能在Update语句中使用MAX

2 个答案: