As, we all know that we can perform the same task by both the Functions and Stored Procedure as well so what to use and when to use it all depend on our requirement.
There are various differences between Functions and Stored Procedure in SQL Server are given below:
As, you would like to know about when you can prefer function or stored procedure so there are few points given below:
Let suppose if our requirement is something like
If there is no need to use any DML statements
If there is no need to perform any transactions.
If you are required to take only input parameters.
No Exception Handling is required.
If there is a need to return a value.
In all the above cases, we can prefer FUNCTIONS.
Let suppose if our requirement is something like
If there is need to use both SELECT and DML statements
If there is a need to perform any transactions.
If you are required to take both input and output parameters.
Exception Handling is required.
If there is no need to return a value.
In all the above cases, we can prefer Stored Procedure.