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Calculated Field in Where Clause
Message
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Syntaxe SQL
Divers
Thread ID:
01451981
Message ID:
01451989
Vues:
71
This message has been marked as a message which has helped to the initial question of the thread.
>In VFP you can do this
>
>Select somefield+somethingelse as mycalcfield from mytable where mycalcfield>10
>
>in T-SQL it seems you have to do this
>Select somefield+somethingelse as mycalcfield from mytable where somefield+somethingelse>10
>
>which means you have to maintain both calcfield expressions which is a maintenance headache
>
>Is there a way in T-SQL to use the calcfield alias in the where expression?

Brandon,

You can only use calculated field by using them from derived table, e.g.
select * from (select SomeComplexExpression as NewField from myTable) X where NewField > 10
I posted this link today, but it fits again and it's one of my favorites

http://bradsruminations.blogspot.com/2010/01/trolls-puzzle-sql-fable.html
If it's not broken, fix it until it is.


My Blog
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