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SQL Server User-Defined Functions

User-Defined Functions (UDFs) are an essential part of the database developers' armoury. They are extraordinarily versatile, but just because you can even use scalar UDFs in WHERE clauses, computed columns and check constraints doesn't mean that you should. Multi-statement UDFs come at a cost and it is good to understand all the restrictions and potential drawbacks. Phil Factor gives an overview of User-defined functions: their virtues, vices and their syntax.

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Question of the Day

QUOTENAME Quote Parameters

When I use QUOTENAME(), I can optionally provide the character used to surround the string in the result. Can I use any character?

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