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So, an integer variable is a scalar value. This means that you can have any integer inside of it that you want. Scalar generally means one-dimensional, so it can be any number on that dimension, like the number line.
Types of Functions. SQL Server 2008 supports user-defined functions and built-in, system, functions. Scalar Functions. User-defined scalar functions return a single data value of the type defined in the RETURNS clause. For an inline scalar function, there is no function body; the scalar value is the result of a single statement.