我有一个 SQL 数据库，其中包含多个 SAP 数据表和一个如下所示的 SQL 语句：
SELECT DISTINCT
AFKO.PLNBEZ AS 'Material',
MAKT.MAKTX AS 'Material Number',
AFKO.AUFNR AS 'Order',
AFVC.VORNR AS 'Operation Number',
CRTX.KTEXT AS 'Operation Text',
AFVV.VGW01 AS 'Estimated Hours 1',
AFVV.VGW02 AS 'Estimated Hours 2',
AFVV.VGW03 AS 'Estimated Hours 3',
AFVV.VGW04 AS 'Estimated Hours 4',
AFVV.VGW05 AS 'Estimated Hours 5',
AFVV.VGW06 AS 'Estimated Hours 6',
AFVV.ISM01 AS 'Actual Hours 1',
AFVV.ISM02 AS 'Actual Hours 2',
AFVV.ISM03 AS 'Actual Hours 3',
AFVV.ISM04 AS 'Actual Hours 4',
AFVV.ISM05 AS 'Actual Hours 5',
AFVV.ISM06 AS 'Actual Hours 6',
(SELECT TOP 1
AFRU.ISDD
FROM AFRU
WHERE AUFNR = AFKO.AUFNR
AND RUECK = AFVC.RUECK
ORDER BY ISDD ASC
) AS 'Op Actual Start Date',
(SELECT TOP 1
AFRU.ISDZ
FROM AFRU
WHERE AUFNR = AFKO.AUFNR
AND RUECK = AFVC.RUECK
ORDER BY ISDZ ASC
) AS 'Op Actual Start Time',
(SELECT TOP 1
AFRU.IEDD
FROM AFRU
WHERE AUFNR = AFKO.AUFNR
AND RUECK = AFVC.RUECK
ORDER BY IEDD DESC
) AS 'Op Actual Finish Date',
(SELECT TOP 1
AFRU.IEDZ
FROM AFRU
WHERE AUFNR = AFKO.AUFNR
AND RUECK = AFVC.RUECK
ORDER BY IEDD DESC
) AS 'Op Actual Finish Time',
AFVC.RUECK AS 'Confirmation Number',
AFVC.ARBID AS 'OBJID',
AFKO.GSTRI AS 'Order Actual Start Date',
AFKO.GETRI AS 'Order Confirmed Finish Date',
COUNT(AFRU.RUECK) AS "No. of Confirmations",
CASE
WHEN COUNT(AFRU.RUECK) = 0 THEN 'Confirmed on mass'
WHEN COUNT(AFRU.RUECK) = 1 THEN 'Auto Confirmation'
ELSE 'User clocked on & off'
END AS Accuracy
FROM AFKO
INNER JOIN afvc ON afvc.AUFPL = AFKO.AUFPL
LEFT OUTER JOIN AFRU afru.rueck = afvc.rueck
INNER JOIN MAKT ON AFKO.PLNBEZ = MAKT.MATNR
INNER JOIN CRHD ON crhd.OBJID = afvc.ARBID
INNER JOIN CRTX ON AFVC.ARBID = CRTX.OBJID
INNER JOIN AFVV ON AFVC.AUFPL = AFVV.AUFPL
AND AFVC.APLZL = AFVV.APLZL
INNER JOIN AUFK ON AFKO.AUFNR = AUFK.AUFNR
WHERE AUFK.WERKS = 1000
AND (crhd.ARBPL LIKE 'BSCREBAR'
OR crhd.ARBPL LIKE 'BSCFISET'
OR crhd.ARBPL LIKE 'BSCWDSP'
OR crhd.ARBPL LIKE 'BSCPRSET'
OR crhd.ARBPL LIKE 'BSCCAST'
OR crhd.ARBPL LIKE 'BSCDEMLD' )
GROUP BY AFKO.PLNBEZ, MAKT.MAKTX, AFKO.AUFNR, AFVC.VORNR, CRTX.KTEXT, AFVV.VGW01, AFVV.VGW02, AFVV.VGW03, AFVV.VGW04, AFVV.VGW05, AFVV.VGW06,
AFVV.ISM01, AFVV.ISM02, AFVV.ISM03, AFVV.ISM04, AFVV.ISM05, AFVV.ISM06, AFRU.ISDD, AFRU.ISDZ, AFRU.IEDD, AFRU.IEDZ, AFVC.RUECK, AFVC.ARBID, AFKO.GSTRI, AFKO.GETRI
;
问题是我COUNT(AFRU.RUECK) AS "No. of Confirmations",返回的值不正确，我相信这与我的一个联接有关，但我不确定。
无论如何，我将 select 语句更改为：
(SELECT COUNT (*) FROM AFRU WHERE RUECK = AFVC.RUECK) AS 'No. of Confirmations',
CASE
WHEN (SELECT COUNT (*) FROM AFRU WHERE RUECK = AFVC.RUECK) = 0 THEN 'Confirmed on mass'
WHEN (SELECT COUNT (*) FROM AFRU WHERE RUECK = AFVC.RUECK) = 1 THEN 'Auto Confirmation'
ELSE 'User clocked on & off'
END AS 'Accuracy'
效果很好，正是我想要的。然而，这不是选择数据的最有效方式。由于更改，该语句需要大约 10 分钟才能运行。
所以我试图将其从上面更改为：
@confs = (SELECT COUNT (*) FROM AFRU WHERE RUECK = AFVC.RUECK),
@confs AS 'No. of Confirmations',
CASE
WHEN (@confs) = 0 THEN 'Confirmed on mass'
WHEN (@confs) = 1 THEN 'Auto Confirmation'
ELSE 'User clocked on & off'
END AS 'Accuracy'
为了消除额外SELECT的 s，使用我在 main 上方声明的变量SELECT- DECLARE @confs int;。
但是，我面临一条错误消息，说：
消息 141，第 15 级，状态 1，第 3 行
为变量赋值的 SELECT 语句不得与数据检索操作结合使用。
我怎样才能解决这个问题？甚至有可能解决这个问题吗？
我见过的在 SQL 中声明变量的每个示例都排除了动态 where 子句。我特别需要引用另一个表AFRU（RUECKAFVC
编辑：
基于上面的 SQL 代码（在我进行任何更改之前），这是我的完整输出示例：
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| Material | Material Number | Order | Operation Number | Operation Text | Estimated Hours 1 | Estimated Hours 2 | Estimated Hours 3 | Estimated Hours 4 | Estimated Hours 5 | Estimated Hours 6 | Actual Hours 1 | Actual Hours 2 | Actual Hours 3 | Actual Hours 4 | Actual Hours 5 | Actual Hours 6 | Op Actual Start Date | Op Actual Start Time | Op Actual Finish Date | Op Actual Finish Time | Confirmation Number | OBJID | Order Actual Start Date | Order Confirmed Finish Date | No. of Confirmations | Accuracy |
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| 1900A-D14MSB-385 | Solid plank | 1713023 | 60 | BSC Casting | 0 | 0 | 2.132 | 0 | 0 | 0 | 0 | 0 | 2.132 | 0 | 0 | 0 | 20200302 | 100959 | 20200302 | 121124 | 7566152 | 10000385 | 20200226 | 20200303 | 3 | User clocked on & off |
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| 1900A-D14MSB-406 | Solid plank | 1713025 | 60 | BSC Casting | 0 | 0 | 2.132 | 0 | 0 | 0 | 0 | 0 | 2.132 | 0 | 0 | 0 | 20200226 | 210329 | 20200226 | 210329 | 7566124 | 10000385 | 20200226 | 20200227 | 1 | Auto Confirmation |
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| 1900A-D14MSB-414 | Solid plank | 1713026 | 40 | BSC Primary Set | 2.132 | 0 | 0 | 0 | 0 | 0 | 0.19 | 0 | 0 | 0 | 0 | 0 | 20200227 | 142442 | 20200227 | 152927 | 7566106 | 10000383 | 20200227 | 20200303 | 2 | User clocked on & off |
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| 1900A-D14MSB-436 | Solid plank | 1713028 | 60 | BSC Casting | 0 | 0 | 0 | 2.132 | 0 | 0 | 0 | 0 | 2.132 | 0 | 0 | 0 | 20200224 | 142546 | 20200224 | 154025 | 7556163 | 10000385 | 20200221 | 20200225 | 2 | User clocked on & off |
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
我的AFRU表是这样的（确认号0007566152）：
在我上面的例子中，“确认次数”是3，但表实际上包含 6 条记录，这意味着 的值3不正确，它实际上应该说6。
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| RUECK | ERSDA | ERZET | ERNAM | WERKS | ISDD | ISDZ | IEDD | IEDZ | AUERU | AUFPL | APLZL | AUFNR | VORNR | fwk_LineageID | fwk_VersionID | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 124517 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 124517 | X | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 121124 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 121124 | | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 124517 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 124517 | X | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 102224 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 102224 | | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 124517 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 124517 | X | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
| 7566152 | 20200302 | 102224 | DHAWLEY | 1000 | 20200302 | 100959 | 20200302 | 102224 | | 717464 | 19 | 1713023 | 60 | 2873485 | 4 | | | | | | | | | | | |
+---------+----------+--------+---------+-------+----------+--------+----------+--------+-------+--------+-------+---------+-------+---------------+---------------+--+--+--+--+--+--+--+--+--+--+--+
在我的最佳结果中，我希望看到该特定记录的值为 6，而不是 3。