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CLR User-Defined Functions

User-defined functions are routines that can take parameters, perform calculations or other actions, and return a result. In Microsoft SQL Server 2005, you can write user-defined functions in any Microsoft .NET Framework programming language, such as Microsoft Visual Basic .NET or Microsoft Visual C#.

There are two types of functions: scalar, which returns a single value, and table-valued, which returns a set of rows.

The following table lists the topics in this section.

Topic Description

CLR Scalar-Valued Functions

Covers implementation requirements and examples of scalar-valued functions.

CLR Table-Valued Functions

Discusses how to implement and use table-valued functions (TVFs), as well as differences between Transact-SQL and common language runtime (CLR) TVFs.

CLR User-Defined Aggregates

Describes how to implement and use user-defined aggregates.

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