Stored Procs & Functions

Question

I have 1 stored procedure that returns a Datetime value , I want to convert it into function so that i can call this function in multiple stored procedure? How can we do that?

Naimish Makwana · Answer

Hello Basit, You can create function like below. CREATE FUNCTION dbo.GetDateTime() RETURNS Datetime AS BEGIN DECLARE @result Datetime -- Replace this with the code from your existing stored procedure SET @result = GETDATE() RETURN @result END Thanks Naimish Makwana

Basit Nisar · Answer

Thanks very much fr help

Amit Mohanty · Answer

Rewrite the stored procedure as a function, using the CREATE FUNCTION statement. The syntax of the CREATE FUNCTION statement is different from that of the CREATE PROCEDURE statement, so you will need to modify the code accordingly. Example: -- Original stored procedure CREATE PROCEDURE dbo.GetCustomerName @CustomerID int, @FirstName varchar(50) OUTPUT, @LastName varchar(50) OUTPUT AS BEGIN SELECT @FirstName = FirstName, @LastName = LastName FROM Customers WHERE CustomerID = @CustomerID END -- Converted function CREATE FUNCTION dbo.GetCustomerName (@CustomerID int) RETURNS varchar(100) AS BEGIN DECLARE @FullName varchar(100) SELECT @FullName = FirstName + ' ' + LastName FROM Customers WHERE CustomerID = @CustomerID RETURN @FullName END

Tuhin Paul · Answer

Hello Basit, To convert your stored procedure that returns a datetime value into a function that can be called from multiple stored procedures, you can follow these steps: 1. Create a new function with the same name as your stored procedure and with the appropriate return type. like: CREATE FUNCTION your_function_name () RETURNS datetime AS BEGIN -- Function body goes here END 2. Now you should copy the body of your stored procedure into the body of your new function, making sure to remove any parameters that are no longer needed. 3. Replace any SELECT statements in the stored procedure with RETURN statements in the function. See below, lets assume your stored procedure looks like this: CREATE PROCEDURE your_stored_procedure_name (@param1 int, @param2 int) AS BEGIN SELECT MAX(datetime_column) AS max_datetime FROM your_table_name WHERE column1 = @param1 AND column2 = @param2 END You would convert it to a function : CREATE FUNCTION your_function_name (@param1 int, @param2 int) RETURNS datetime AS BEGIN DECLARE @max_datetime datetime SELECT @max_datetime = MAX(datetime_column) FROM your_table_name WHERE column1 = @param1 AND column2 = @param2 RETURN @max_datetime END 4. Modify your existing stored procedures to call the new function instead of the old stored procedure, passing any required parameters. like below: CREATE PROCEDURE your_other_stored_procedure_name (@param1 int) AS BEGIN DECLARE @max_datetime datetime -- Call the function instead of the stored procedure SET @max_datetime = dbo.your_function_name(@param1) -- Rest of the stored procedure body goes here END With these changes, you should be able to call your new function from multiple stored procedures, passing in any required parameters, and returning a datetime value.