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crugerenator
Posting Yak Master
126 Posts |
 Posted - 2012-11-06 : 17:27:07
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This is part of a subselect in a where clause and is driving me crazy. It's in a subselect because the query needs to figure out the top (1) run id of a job that runs multiple times her day. What I'm trying to do is expand the query to provide results for the top (1) runid for ALL jobs. Here is the subselect:SELECT TOP (1) id FROM dbo.ENV_TABLE_NAME WHERE (service_id = '63') and (run_date between '11/05/2012 21:00:00' and '11/6/2012 21:00:00') The query sets runid of another table = to the top (1) id returned from this query. What I want to do is have the subselect return the top (1) id for all server results, and instead of setting the runid = to the top (1) id, it will use in since the subselect will be returning multiple id's.For example:runid in (SELECT id FROM dbo.ENV_TABLE_NAMEWHERE (rundate between '11/05/2012 21:00:00' and '11/6/2012 21:00:00') ORDER BY id DESC)) This works fine, but I need to return only the top id per all service_id's between the time frame specified. Is this possible? |
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bandi
Master Smack Fu Yak Hacker
2242 Posts |
Posted - 2012-11-06 : 23:55:38
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| [code]SELECT service_id, id FROM dbo.ENV_TABLE_NAME t1WHERE (run_date between '11/05/2012 21:00:00' and '11/6/2012 21:00:00')AND ID = (SELECT top 1 ID FROM dbo.ENV_TABLE_NAME t2 WHERE (run_date between '11/05/2012 21:00:00' and '11/6/2012 21:00:00') AND t1.service_id = t2.service_id ORDER BY ID DESC)[/code]--Chandu |
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How to return only the highest value per field