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SQL Join Query question

Posted on 2011-09-12
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Last Modified: 2012-05-12
Hi,

I have the below query that works on one column, then creates a table from the result that gets.

I need a query that checks 3 columns then creates the table from the result.

I need to check for any change for the columns [ps].ASE, [ps].Env, [ps].City

Thank you,
RD11
SELECT [ps].ETag, [ps].Host, [ps].[Private Input], [ps].[From ci db], [ps].[ID-PK], [ps].Src, [ps].ASE, [ps].Env, [ps].EnvD, [ps].Cls [ps].City, [ps].[Surpluss EST], [ps].[Monthly Cost], [ps].Description, [ps].[Install Date], [ps].[Purchase Date], [ps].Env, [ps].Pool, [ps].Billed, [ps].Price, [ps].[C Org], [ps].[Resp], [ps].Function,[ps].Comments, [ps].[Last Update], [ps].OS, [ps].Status INTO Diff_table
FROM [ps] LEFT JOIN cI_table ON [ps].Host = cI_table.HOST
WHERE (((cI_table.HOST) Is Null));

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Question by:RD11
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7 Comments
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 36526526

Checks the three columns exactly for what?

If they are different in the diff table, you can use exists
SELECT [ps].ETag, [ps].Host, [ps].[Private Input], [ps].[From ci db], [ps].[ID-PK], [ps].Src, [ps].ASE, [ps].Env, [ps].EnvD, [ps].Cls [ps].City, [ps].[Surpluss EST], [ps].[Monthly Cost], [ps].Description, [ps].[Install Date], [ps].[Purchase Date], [ps].Env, [ps].Pool, [ps].Billed, [ps].Price, [ps].[C Org], [ps].[Resp], [ps].Function,[ps].Comments, [ps].[Last Update], [ps].OS, [ps].Status 
INTO Diff_table
FROM [ps] 
LEFT JOIN cI_table ON [ps].Host = cI_table.HOST
where not exists (select 1 from Diff_table B
                  where [ps].ASE = B.ASE and [ps].Env = B.Env and [ps].City = B.City)
and (((cI_table.HOST) Is Null));

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Author Comment

by:RD11
ID: 36526530
If any change in either any one of them.
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LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 36526541

This line will get the rows that are not in the diff table based on the three columns

where not exists (select 1 from Diff_table B where [ps].ASE = B.ASE and [ps].Env = B.Env and [ps].City = B.City)
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LVL 32

Accepted Solution

by:
Ephraim Wangoya earned 2000 total points
ID: 36526548
You will actually need  a primary key for all this to work properly, so assuming the primary key is ETag

where not exists (select 1 from Diff_table B where [ps].ETag = B.ETag and [ps].ASE = B.ASE and [ps].Env = B.Env and [ps].City = B.City)
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Author Comment

by:RD11
ID: 36526633
I actually DO NOT have a primary Key, I am using the Host name as a PK.  Can I still do that?
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LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 36526859

That should work
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Author Closing Comment

by:RD11
ID: 36532913
Thank you
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