SQL连接同一个表并创建单行结果以完成空值

我在SQL中只有一个源表。我正试图将它自身连接起来，以便填充空值并将优先级值保留在一行中。有数百万条记录

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

由此：

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

为此（预期结果）：

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

那么，我如何将表连接到它自身以获得单行结果呢

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

我尝试过使用下面的查询，并将其作为一个视图，但仅检索一行就需要永远执行

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

 --CREATE VIEW  dbo.vw_JOIN AS
    WITH MyTABLE AS (
    SELECT * FROM  TABLE1
    WHERE  Owner = 'Source2')

    SELECT

    T1.ID1,
    T1.Source1ID,
    T2.Source2ID,
    T1.Owner,
    T1.Source1Date,
    T1.Source1Desc,
    T2.Source2Date
    T2.Source2Desc

    FROM TABLE1 T1
    LEFT JOIN MyTABLE T2
    ON T1.Source1ID = T2.Source1ID
    OR T1.Source2ID = T2.Source2ID
    WHERE T1.Owner = 'Source1'

这就是你想要的吗

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

select min(id1) as id1, Source1ID, min(Owner) as owner,
       min(Source2ID) as Source2ID, min(Source1Desc) as Source1Desc,
       min(Source2Date) as Source2Date, min(Source2Desc) as Source2Desc
from t
group by source1ID;

declare @table table (id1 int, source1id varchar(50),source2Id varchar(50),[owner] varchar(50),Source1Date date,Source1Desc varchar(50),Source2Date date, source2Desc varchar(50)
)
insert into @table

values


(8,   '1asd23',    'a567nm'    ,'Source1' ,'1/1/1900' ,   'Active',      NULL ,       NULL),
(9 ,  '1asd23',    'b555cc'    ,'Source2', NULL      ,  NULL       , '12/1/2000',   'Ongoing')

select a.id1,a.source1id,b.source2Id,a.owner,a.Source1Date,a.Source1Desc,b.Source2Date,b.source2Desc from @table a

inner join @table b on a.source1id = b.source1id and a.source2Id != b.source2Id  where a.owner ='source1'

这是你想要的吗

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    a567nm    Source1 1/1/1900    Active      NULL        NULL
9   1asd23    b555cc    Source2 NULL        NULL        12/1/2000   Ongoing

ID1 Source1ID Source2ID Owner   Source1Date Source1Desc Source2Date Source2Desc
8   1asd23    b555cc    Source1 1/1/1900    Active      12/1/2000   Ongoing

select min(id1) as id1, Source1ID, min(Owner) as owner,
       min(Source2ID) as Source2ID, min(Source1Desc) as Source1Desc,
       min(Source2Date) as Source2Date, min(Source2Desc) as Source2Desc
from t
group by source1ID;

declare @table table (id1 int, source1id varchar(50),source2Id varchar(50),[owner] varchar(50),Source1Date date,Source1Desc varchar(50),Source2Date date, source2Desc varchar(50)
)
insert into @table

values


(8,   '1asd23',    'a567nm'    ,'Source1' ,'1/1/1900' ,   'Active',      NULL ,       NULL),
(9 ,  '1asd23',    'b555cc'    ,'Source2', NULL      ,  NULL       , '12/1/2000',   'Ongoing')

select a.id1,a.source1id,b.source2Id,a.owner,a.Source1Date,a.Source1Desc,b.Source2Date,b.source2Desc from @table a

inner join @table b on a.source1id = b.source1id and a.source2Id != b.source2Id  where a.owner ='source1'

---

@SQLKnows，尝试相同的查询，但使用MAX（）而不是MIN（）。您不清楚自己想要什么。使用足够的单词和句子使其清晰。另外，请注意。此代码仅适用于此示例。我不知道你剩下的数据是怎样的，所以它可能会崩溃。否则，请使用Gordons的示例，并在值错误的地方使用MAX