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What is a Function & what are the different user defined functions?

April 26, 2017defined different function functions user

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What is a Function & what are the different user defined functions?

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Function is a saved Transact-SQL routine that returns a value. User-defined functions cannot be used to perform a set of actions that modify the global database state. User-defined functions, like system functions, can be invoked from a query. They also can be executed through an EXECUTE statement like stored procedures.