Question

我正在尝试进行查询以获取特定公司的所有票证。在该表中将是一个名为[Repeat]

的列

我需要查询做的是检查是否有任何其他行在该票证的最后30天内具有匹配的Circuit_ID。

"SELECT [MAIN_TICKET_ID], [CompID], [ActMTTR], [ActOTR], [DtCr], [DtRFC],
                CASE WHEN [PRIORITY] = 1 THEN '1' 
                     WHEN [PRIORITY] = 2 THEN '2' 
                     WHEN [PRIORITY] = 3 THEN '3' END AS [PRIORITY],
                CASE WHEN ([PRIORITY] = '1' AND [ActMTTR] >= '4' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '1' AND [ActOTR] >= '14' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '2' AND [ActMTTR] >= '6' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '2' AND [ActOTR] >= '16' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR (([Rpt5] = '1' OR [Rpt30] = '1' OR [Chronic] = '1') AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) THEN 'Yes' ELSE 'No' END AS [Measured],  
                CASE WHEN [Reviewed] = 1 THEN 'Yes' ELSE 'No' END AS [Reviewed],
                CASE WHEN [Rpt5] = 1 OR [Rpt30] = 1 THEN 'Yes' ELSE 'No' End As [Repeat],
                CASE WHEN [Chronic] = 1 THEN 'Yes' ELSE 'No' END AS [Chronic],
                CASE WHEN [ResCd7] = 'Equipment (XX)' THEN 'XX' 
                     WHEN [ResCd7] = 'Isolated to Customer (ITC)' THEN 'ITC' 
                     WHEN [ResCd7] = 'Information (INF)' THEN 'INF' 
                     WHEN [ResCd7] = 'Test OK (TOK)' THEN 'TOK' 
                     WHEN [ResCd7] = 'Lec Facilities (LEC)' THEN 'LEC' 
                     WHEN [ResCD7] = 'Dispatched No Trouble Found (NTF)' THEN 'NTF' 
                     WHEN [ResCD7] = 'Cleared While Testing (CWT)' THEN 'CWT' END AS [Resolution]
                FROM [SNA_Ticket_Detail] WHERE ([CompID] = @CompID)"

以上是当前查询，它依赖于表中的0或1标志。在网上看到了情况[Rpt5] = 1或[Rpt30] = 1那么'是'ELSE'否'结束为[重复]，

我想要做的是用

的内容替换它

CASE WHEN (SELECT COUNT([XX_CIRCUIT_ID]) FROM SNA_Ticket_Detail WHERE (CONVERT(CHAR(10), [DtRFC], 101) BETWEEN ([DtRFC] - 6) AND ([DtRFC])) AND (XX_CIRCUIT_ID = XX_CIRCUIT_ID)) > '1' THEN 'Yes' ELSE 'No' End As [Repeat],

这不起作用..它基本上计算所有行，而不仅仅是与当前行电路ID匹配的行，并且在上个月内。

我不知道如何正确编码以使其正常工作。或者即使在查询中也可以。

Answer 1

您希望针对同一个表运行子查询，因此您需要对表的两种用法进行别名（next和td如下）。在寻找感兴趣的行时，在这种情况下，具有相同电路ID并且在一定范围内的行，您需要确保您没有查看完全相同的行。因此检查[MAIN_TICKET_ID]。您可以根据您的示例执行COUNT，或者您可以执行以下的EXISTS（）。

SELECT [MAIN_TICKET_ID], [CompID], [ActMTTR], [ActOTR], [DtCr], [DtRFC],
                CASE WHEN [PRIORITY] = 1 THEN '1' 
                     WHEN [PRIORITY] = 2 THEN '2' 
                     WHEN [PRIORITY] = 3 THEN '3' END AS [PRIORITY],
                CASE WHEN ([PRIORITY] = '1' AND [ActMTTR] >= '4' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '1' AND [ActOTR] >= '14' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '2' AND [ActMTTR] >= '6' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR ([PRIORITY] = '2' AND [ActOTR] >= '16' AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) 
                       OR (([Rpt5] = '1' OR [Rpt30] = '1' OR [Chronic] = '1') AND ([ResCd7] = 'Equipment (XX)' OR [ResCd7] = 'Lec Facilities (LEC)')) THEN 'Yes' ELSE 'No' END AS [Measured],  
                CASE WHEN [Reviewed] = 1 THEN 'Yes' ELSE 'No' END AS [Reviewed],
                CASE WHEN EXISTS ( select * from SNA_Ticket_Detail recent 
                       where recent.XX_CIRCUIT_ID = td.XX_CIRCUIT_ID
                       AND recent.[MAIN_TICKET_ID] <> td.[MAIN_TICKET_ID]
                       AND datediff( month, recent.[DtRFC], td.[DtRFC] ) < 1 
                      AND recent.[DtRFC] < td.[DtRFC]) 
            THEN 'Yes' ELSE 'No' End As [Repeat],
                CASE WHEN [Chronic] = 1 THEN 'Yes' ELSE 'No' END AS [Chronic],
                CASE WHEN [ResCd7] = 'Equipment (XX)' THEN 'XX' 
                     WHEN [ResCd7] = 'Isolated to Customer (ITC)' THEN 'ITC' 
                     WHEN [ResCd7] = 'Information (INF)' THEN 'INF' 
                     WHEN [ResCd7] = 'Test OK (TOK)' THEN 'TOK' 
                     WHEN [ResCd7] = 'Lec Facilities (LEC)' THEN 'LEC' 
                     WHEN [ResCD7] = 'Dispatched No Trouble Found (NTF)' THEN 'NTF' 
                     WHEN [ResCD7] = 'Cleared While Testing (CWT)' THEN 'CWT' END AS [Resolution]
                FROM [SNA_Ticket_Detail] td WHERE ([CompID] = @CompID)

你应该检查datediff做你想要的 - 只是玩一些测试数据。此外，您可能希望确保“最近”行实际上不在检索之后，所以我添加了：

AND recent.[DtRFC] < td.[DtRFC]

虽然如果你知道你的票证ID是连续的，你可以用它们而不是日期字段做同样的事情。

Answer 2

如果在外部查询中使用别名SNA_Ticket_Detail（例如SNA_Ticket_Detail SNA），则可以在子查询中引用它

为简单起见，也在子查询中使用了SNA_Tick_Detail（SNA_Ticket_Detail SNA_sub）

然后，你当前有（XX_CIRCUIT_ID = XX_CIRCUIT_ID），这将改为（SNA_sub.XX_CIRCUIT_ID = SNA.XX_CIRCUIT_ID）

Answer 3

对于SQL的最小更改，请更改子查询，如下所示：

SELECT ... FROM SNA_Ticket_Detail AS i WHERE ... AND i.XX_CIRCUIT_ID = [SNA_Ticket_Detail].[XX_CIRCUIT_ID]

你必须以某种方式引用外部表，你不能只比较XX_CIRCUIT_ID和XX_CIRCUIT_ID的相等性 - 这将比较永远是真的。 ; - ）

相反，为了清晰起见，您必须将引用为XX_CIRCUIT_ID的外部[SNA_Ticket_Detail].[XX_CIRCUIT_ID]与引用为XX_CIRCUIT_ID的内部i.XX_CIRCUIT_ID进行比较。

Answer 4

尝试

SELECT（COUNT（）...）＆gt; 1

而不是

SELECT（COUNT（）...）＆gt; '1'

Answer 5

这是一个混乱的查询...

您需要将“内部”查询（a.k.a.子查询）过滤到外部查询。这个概念通常称为correlated subquery。见罗里的解决方案。

或者，您可以将JOIN用于包含聚合数据的视图（或派生表）。通常，这是性能的最佳选择。

如何计算查询中的相关行

5 个答案: