Scalar-Valued Functions
Explore how to create scalar-valued user-defined functions in T-SQL. Learn to define functions that accept parameters and return single values, enhancing your ability to perform custom calculations and data manipulation within Microsoft SQL Server.
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If built-in functions do not meet all of our needs, we can create custom functions with T-SQL. User-defined functions can accept zero or more parameters and return either a scalar value or a table. In this lesson, we’ll focus on scalar-valued functions, which are functions that return a single value.
Creating user-defined functions
New functions can be created using the CREATE FUNCTION command. Because a function is a database object, it must be created within some database. A function may or may not accept parameters. The complete syntax for declaring a function is: ...