The SQL CREATE FUNCTION statement is used to define a new user-defined function (UDF) in a database. A function in SQL is a set of SQL statements that perform a specific task and return a single value.

Creates a user-defined function (UDF), which is a Transact-SQL or common language runtime (CLR) routine. A user-defined function accepts parameters, performs an action such as a complex calculation, and returns the result of that action as a value. The return value can either be a scalar (single) value or a table.

The example below shows how to create a function in the SQL Server database using the T-SQL language. The created function is of scalar type, the CREATE FUNCTION keyword is used, the function contains an int type parameter and returns a single value, the returned type is money.

Sep 29, 2024 · This article describes how to create a user-defined function (UDF) in SQL Server by using Transact-SQL. User-defined functions can't be used to perform actions that modify the database state. User-defined functions can't contain an OUTPUT INTO clause that has a table as its target. User-defined functions can't return multiple result sets.

SQL User-Defined Functions (UDFs) are custom functions created by users to perform specific tasks within a relational database management system (RDBMS). These functions encapsulate a set of SQL statements, allowing users to execute complex operations, calculations, or data manipulations with a single function call.

Feb 26, 2024 · I will show you how to CREATE FUNCTION in SQL Server in this SQL Server tutorial. You will understand what function is, why to use the function, and how it reduces the repetitive task by encapsulating complex logic.

Feb 25, 2020 · In today’s article, we’ll see how to create, change and remove them from the database, as well as how to use them. So, let’s dive into the matter. As mentioned in the introduction, there are different kinds of objects you could create in the database. Besides tables and keys, other well-known objects are procedures, triggers, and views.

Functions in SQL Server contains SQL statements that perform some specific tasks. Functions can have input parameters and must return a single value or multiple records.

Next time instead of rewriting the SQL, you can simply call that function. A function accepts inputs in the form of parameters and returns a value. SQL Server comes with a set of built-in functions that perform a variety of tasks.

Creating your own SQL functions can help streamline your database queries by encapsulating logic into a single function call. To create an SQL function, you need to define its name, input parameters, and return type, as well as the logic to be executed within the function body.