【发布时间】：2020-06-19 02:07:54
【问题描述】：
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
;
问题是我的COUNT(AFRU.RUECK) AS "No. of Confirmations", 返回了不正确的值，我相信这与我的一个联接有关，但我不确定。
不管怎样，我把select语句改成了这样：
(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。
所以我尝试将其从上面的更改为：
@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'
为了消除额外的SELECTs，使用我在主SELECT 上方声明的变量-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。
我该如何解决这个问题？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) 来获取特定确认号 (RUECK) 的记录数量——它来自另一个表 (AFVC)，作为我主要选择语句的一部分。
编辑：
基于上面的 SQL 代码（在我进行任何更改之前），这是我完整输出的示例：
+------------------+-----------------+---------+------------------+-----------------+-------------------+-------------------+-------------------+-------------------+-------------------+-------------------+----------------+----------------+----------------+----------------+----------------+----------------+----------------------+----------------------+-----------------------+-----------------------+---------------------+----------+-------------------------+-----------------------------+----------------------+-----------------------+
| 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3的值不正确，它实际上应该是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。
【问题讨论】：
-
所有这些
SELECT TOP 1查询本质上也是连接。这是返回相关行 和 非常慢的不好方法。COUNT(AFRU.RUECK)部分是唯一可以正常工作的部分，并且会根据此GROUP BY返回正确的计数。 -
想做什么？样本数据是什么，你得到了什么结果，预期的结果是什么？
-
这样做的原因是返回特定字段的“最早”和“最新”日期/时间值。实现相同输出的另一种方法是什么？我将使用当前表格数据、当前结果和预期结果的样本更新我的问题
-
PS
crhd.ARBPL LIKE 'BSCREBAR'只是一个crhd.ARBPL = 'BSCREBAR'并且整个子句本质上是写crhd.ARBPL IN 'BSCREBAR', 'BSCFISET',...)的冗长方式 -
@MarcGuillot 它可能是虽然简单 - 一个错误的期望，因为其他行被 JOIN 过滤掉
标签： sql sql-server database sap sql-data-warehouse