Scalar functions in SQL Server

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Muhammad Imran Ansari · Answer

A scalar function in SQL Server is a user-defined function that accepts one or more parameters, performs operations, and returns a single value (such as a string, number, or date) as its result. It can be used in SELECT , WHERE , or any other clause where an expression is allowed. CREATE FUNCTION dbo.GetFullName (@FirstName NVARCHAR(50), @LastName NVARCHAR(50)) RETURNS NVARCHAR(100) AS BEGIN RETURN @FirstName + ' ' + @LastName END --Usage SELECT dbo.GetFullName('Imran', 'Ansari') AS FullName; -- Output: Imran Ansari Good Luck!

Cynthia Sathuragiri · Answer

A scalar function in SQL Server is a user-defined function that returns a single value (like int, string, or date). CREATE FUNCTION dbo.GetSquare (@num INT) RETURNS INT AS BEGIN RETURN @num * @num END SELECT dbo.GetSquare(5); -- Output: 25 Used in SELECT, WHERE, etc., but may affect performance on large datasets since it runs row-by-row.

Harry Betancourt · Answer

This scalar function is very useful for reusing processing logic, helping you avoid code repetition when you need to manipulate similar data in multiple places. Additionally, encapsulating logic in a separate function makes SQL statements clearer, retro bowl college, easier to read, and easier to maintain, especially in large or complex systems.

Scalar functions in SQL Server

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