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How to have multiple select statements in CASE


How to have multiple select statements in CASE

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MVIT
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eg.

CASE Type
WHEN 1 THEN Select * from table1
WHEN 2 THEN Select * from Table 2
ELSE Select * from Table 3
END


Am finding difficulty to write the Select statements.Please help me !
ChrisM@Work
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Can you show the context in which this would be used?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
MVIT
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Based on the Type I need to query different tables to get the data.
I hope this helps!
ChrisM@Work
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Not really. CASE is used within a query. Can you post the whole query within which you want to use the CASE construct?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
MVIT
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So as per your comments, I need to use multiple If's.... But if there are more than 100 types , then having 100 if's would not be good practice ?
ChrisM@Work
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sabeer.mvit (1/29/2014)
So as per your comments, I need to use multiple If's.... But if there are more than 100 types , then having 100 if's would not be good practice ?

Regards,
Sabeer


No, I've said nothing about IF. Post the whole query in which you want to use your CASE.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
MVIT
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The sample query that I have mentioned in my post is the similar to what I need to write.
ChrisM@Work
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Where does the column [Type] come from?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Farlzy
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Surely the only way you'd achieve this is with dynamic sql, which would be an absolute pig to maintain. Could you combine the various table you want to query into a single view, exposing the type too, then join on to the view?
Sean Lange
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Farlzy (1/29/2014)
Surely the only way you'd achieve this is with dynamic sql, which would be an absolute pig to maintain.


That is a pretty bold statement to make when we don't really know what the OP is trying to do.

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