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What are functions in SQL Server?

Contents
  1. What are functions in SQL?
  2. What are the types of functions in SQL Server?
  3. How do you define a function in SQL Server?
  4. What are the 5 built in functions in SQL?
A function is a database object in SQL Server. Basically, it is a set of SQL statements that accept only input parameters, perform actions and return the result. The function can return only a single value or a table. We can't use a function to Insert, Update, Delete records in the database table(s). 9 мая 2022 г.


What are functions in SQL?

A function is a set of SQL statements that perform a specific task. Functions foster code reusability. If you have to repeatedly write large SQL scripts to perform the same task, you can create a function that performs that task. Next time instead of rewriting the SQL, you can simply call that function.

What are the types of functions in SQL Server?

SQL Server supports two types of functions - user-defined and system.User-Defined function: User-defined functions are create by a user.System Defined Function: System functions are built-in database functions.Functions In SQL Server - C# Corner

How do you define a function in SQL Server?

CREATE/ALTER/DROP User-Defined Function1CREATE FUNCTION [database_name.] function_name (parameters)2RETURNS data_type AS.3SQL statements.4RETURN value.5ALTER FUNCTION [database_name.] function_name (parameters)6RETURNS data_type AS.7SQL statements.8RETURN value.Learn SQL: User-Defined Functions - SQLShack

What are the 5 built in functions in SQL?

The correct answer is option A (COUNT, SUM, AVG, MAX, MIN). All these are aggregate functions that are in-built functions provided by SQL. These five functions perform calculations on the result-set and return the single value.

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