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View with EXISTS


View with EXISTS

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ikrami2000
ikrami2000
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The below view is not work .....

Create View XYZ As

IF Exists
(
select Code from PR_Header where Code = (Select 'PR-'+''+ CAST(Count(a.ID)+1 as varchar ) from PR_Header a Group by a.Company)
)
Begin
Select 'PR-'+''+ CAST(Count(ID)+2 as varchar ) as PR_PR ,'Default PR',Company from PR_Header Group by Company
End
Else
Select 'PR-'+''+ CAST(Count(ID)+1 as varchar ) as PR_PR ,'Default PR',Company from PR_Header Group by Company
Koen Verbeeck
Koen Verbeeck
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I don't think you can use the IF...ELSE construct in a view.
You'll need a stored procedure for that.

The error might have given this away:


Msg 156, Level 15, State 1, Procedure Test, Line 3
Incorrect syntax near the keyword 'IF'.




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ikrami2000
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i already got the error , but i need to store this values in a view
Koen Verbeeck
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ikrami2000 (10/16/2013)
i already got the error , but i need to store this values in a view


You cannot "store" values in a view.



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Sean Lange
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Not entirely sure what you are trying to do here but you don't need an IF statement to do this type of thing.

See if this will get what you are looking for.


CREATE VIEW XYZ
AS
SELECT 'PR-' + '' + CAST(Count(ID) + CASE
WHEN EXISTS (
SELECT Code
FROM PR_Header
WHERE Code = (
SELECT 'PR-' + '' + CAST(Count(a.ID) + 1 AS VARCHAR)
FROM PR_Header a
GROUP BY a.Company
)
)
THEN 2
ELSE 1
END AS VARCHAR) AS PR_PR
,'Default PR'
,Company
FROM PR_Header
GROUP BY Company



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ikrami2000
ikrami2000
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Thanks :-) , this is exactly what i want
Sean Lange
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ikrami2000 (10/16/2013)
Thanks :-) , this is exactly what i want


You are quite welcome. I would caution you that there are a few things in that code that I would recommend changing. You are concatenating empty strings which is totally pointless. You also have a number of cast to varchar where you don't specify the size of the varchar. Do you know what the default size for a varchar is? I can't remember either. This is why you should always add the size to your declaration.

Something like this:


CREATE VIEW XYZ
AS
SELECT 'PR-' + CAST(Count(ID) + CASE
WHEN EXISTS (
SELECT Code
FROM PR_Header
WHERE Code = (
SELECT 'PR-' + CAST(Count(a.ID) + 1 AS VARCHAR(5))
FROM PR_Header a
GROUP BY a.Company
)
)
THEN 2
ELSE 1
END AS VARCHAR(5)) AS PR_PR
,'Default PR'
,Company
FROM PR_Header
GROUP BY Company



_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Moden's splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
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