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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:
01452034
Vues:
38
>>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?
>
>
>You can also use CROSS APPLY:
>
>SELECT MyCalcField
>FROM MyTable
>CROSS APPLY (SELECT SomeField+SomethingElse AS MyCalcField) F
>WHERE MyCalcField>10
>
>That will produce the same query plan as the query you wrote above.
>
>--Brad

Another pet peeve of yours? :))

Read your UNPIVOT blog this morning - thanks again.
If it's not broken, fix it until it is.


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