Question

为什么SQL Case＆＃39;不在＆＃39;不行？＆＃39;在＆＃39;虽然它不匹配＆＃39;不在＆＃39;。

或许有更好的方法可以做到这一点？

我正在尝试将结果应用于满足条件设置的匹配项，只要它不符合其他标准集。

谢谢

＆＃13;

---------- Newsletters ----------

CASE WHEN	(	C.ID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	C.ID in		(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	ESC.ContactEnquiryID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable = 'Enquiry')
			AND ESC.ContactEnquiryID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND ReferenceTable = 'Enquiry')
			)
 THEN 'K' 

 ELSE 

CASE WHEN	(	C.ID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND YearLevel < 7 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	C.ID in		(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND YearLevel < 7 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	ESC.ContactEnquiryID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND YearLevel < 7 AND ReferenceTable = 'Enquiry')
			AND ESC.ContactEnquiryID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel = 0 AND ReferenceTable = 'Enquiry')
			AND ESC.ContactEnquiryID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND ReferenceTable = 'Enquiry')
			)
			
 THEN '1-6' 

  ELSE 

CASE WHEN	(	C.ID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND YearLevel < 13 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel < 7 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	C.ID in		(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND YearLevel < 13 AND ReferenceTable <> 'Enquiry')
			AND C.ID not in	(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel < 7 AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	ESC.ContactEnquiryID in		(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 6 AND YearLevel < 13 AND ReferenceTable = 'Enquiry')
			AND ESC.ContactEnquiryID not in	(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel < 7 AND ReferenceTable = 'Enquiry')
			)
 THEN '7-6' 

  ELSE 

CASE WHEN	(	C.ID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	C.ID in		(SELECT  [ContactSpouseID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND ReferenceTable <> 'Enquiry')
			)
			OR
			(	ESC.ContactEnquiryID in		(SELECT  [ContactID]  FROM [Customers].[dbo].[uvLSProspectiveContacts] WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND ReferenceTable = 'Enquiry')
			)

 THEN 'General'

  ELSE ''  END END

	END 
END AS ProspectiveNews,

＆＃13;

Answer 1

欢迎来到NULL地狱替换每一个

x not in (select col from t)

与

x not in (select col from t where col is not null)

（除非您知道x被定义为NOT NULL）

x not in (a,b,c,...)
是一个快捷方式 ((x <> a) and (x <> b) and (x <> c) and ...)
如果其中一个值（例如b）为NULL，则条件为NULL <> b 因为没有什么不同于NULL，所以这个谓词没有得到满足，并且它在整个条件下都失败了。

Answer 2

尝试NOT EXISTS：

AND NOT EXISTS (SELECT * FROM [Customers].[dbo].[uvLSProspectiveContacts]
WHERE [EnrolDate] > '2016-12-31 00:00:00.000' AND YearLevel > 0 AND
ReferenceTable <> 'Enquiry' AND [ContactID] = C.ID)

SQL Case NOT IN无法正常工作

2 个答案: