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Types of calculated fields in a query

Posted By:      Posted Date: September 07, 2010    Points: 0   Category :Sql Server
 
Hello, I have a question about how the SQL server engine determines the types of calculated fields. For simple calculations I assume it's based on the types of the fields composing the query as they are defined in their tables, but what about a calculated field in this form, for example: isnull(field-name,-99)? Is there a way I can change the engine's selection in the query? Thanks.


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