Question

Status      Agency  Policy  
---------   ------  ------
Submitted   Ag1     AAA

Rated       Ag1     AAA 

Lost        Ag1     AAA 

Issued      Ag1     AAA 

Submitted   Ag1     BBB 

Rated       Ag1     BBB 

Lost        Ag2     BBB 

Issued      Ag1     BBB

我有这些数据，例如...... “对于一项政策，如果同一机构既有失物招领又有遗失，那么我不想要失去记录但如果政策既丢失又从不同的代理机构发出，那么我想要所有的记录

结果集：

Status      Agency  Policy  
---------   ------  ------
Submitted   Ag1     AAA

Rated       Ag1     AAA 

Issued      Ag1     AAA 

Submitted   Ag1     BBB 

Rated       Ag1     BBB 

Lost        Ag2     BBB 

Issued      Ag1     BBB

Answer 1

下面的子句执行以下操作：
当状态未丢失时，请始终返回记录当状态丢失时，请检查代理商是否没有任何代理机构与“失去的”组合。和＆＃39;发布＆＃39;返回记录。

DECLARE @t  TABLE(  [Status] NVARCHAR(50),
                    Agency   NVARCHAR(50),
                    Policy   NVARCHAR(50))


INSERT INTO @t
VALUES(
'Submitted',    'Ag1',     'AAA'),
('Rated',       'Ag1',     'AAA'), 
('Lost',        'Ag1',     'AAA'), 
('Issued',      'Ag1',     'AAA'), 
('Lost',        'Ag2',     'AAA'), 
('Submitted',   'Ag1',     'BBB'), 
('Rated',       'Ag1',     'BBB'), 
('Lost',        'Ag2',     'BBB'), 
('Issued',      'Ag1',     'BBB'), 
('Lost',        'Ag0',     'CCC')

--In the bellow "Select", replace "@t" with your table.
SELECT *
FROM @t AS t
WHERE NOT EXISTS (  SELECT 1
                    FROM   @t AS sub
                    WHERE  sub.Policy = t.Policy
                    AND    sub.Agency = t.Agency
                    AND    sub.[Status] = 'Issued' )
OR [Status] NOT IN ('Lost', 'Declined')

结果：

Submitted   Ag1 AAA
Rated       Ag1 AAA
Issued      Ag1 AAA
Lost        Ag2 AAA
Submitted   Ag1 BBB
Rated       Ag1 BBB
Lost        Ag2 BBB
Issued      Ag1 BBB
Lost        Ag0 CCC

Answer 2

相关子查询可用于过滤＆＃34; Lost＆＃34;匹配＆＃34;发布＆＃34;记录存在于同一机构和政策中。

SELECT  Status, Agency, Policy
FROM    YourTable AS t1
WHERE   Status NOT IN ( 'Lost', 'Declined' )
OR      NOT EXISTS (
            SELECT 1
            FROM   YourTable AS t2
            WHERE  t2.Agency = t1.Agency
            AND    t2.Policy = t1.Policy
            AND    t1.Status IN ( 'Lost', 'Declined' )
            AND    t2.Status = 'Issued' )

sql根据列中值的组合获取行

2 个答案: