Input Parameters in SQL Stored Procedure

How to use Input Parameters in SQL Stored Procedure?. Or How to use Input Parameters in Select, Insert, and Update Stored Procedures with example.

I suggest you to refer Introduction to Stored Procedure article to understand the basics of the stored procedure. For this SQL stored procedure input parameters demonstration, We are going to use the below-shown SQL table

Input Parameters in SQL Stored Procedure Select Statement

In this example, we will show you how to use the Input Parameters in Select Stored procedures. Please refer to Select Stored Procedure in SQL article to understand how to write Select statement inside a stored procedure.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO
CREATE PROCEDURE spGetEmployeeDetails
	@Occupation VARCHAR(50)
AS
BEGIN
  SET NOCOUNT ON;
    SELECT [FirstName] + ' ' + [LastName] AS [Full Name]
          ,[Education]
          ,[Occupation]
          ,[YearlyIncome]
          ,[Sales]
          ,[HireDate]
    FROM [EmployeeDuplicates]
    WHERE [Occupation] = @Occupation
END

Let me execute the stored procedure. Here, we have to pass the value for the @Occupation parameter. So, let me pass the parameter value using any of the following ways

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO

EXEC [dbo].[spGetEmployeeDetails] N'Management';
GO
--OR You Can Write
EXEC [dbo].[spGetEmployeeDetails] @Occupation = N'Professional';
GO

Input Parameters in Select Stored Procedure Example 2

In this example, we will use the Multiple Input parameters along with the Select statement inside a stored procedure.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO
CREATE PROCEDURE spSelectEmployeeDetails
	@Education VARCHAR(50),
	@Occupation VARCHAR(50)
AS
BEGIN
	SET NOCOUNT ON;
	SELECT [FirstName] + ' ' + [LastName] AS [Full Name]
          ,[Education]
          ,[Occupation]
          ,[YearlyIncome]
          ,[Sales]
          ,[HireDate]
	FROM [EmployeeDuplicates]
	WHERE [Education] = @Education OR [Occupation] = @Occupation
END

The following are the number of ways you can execute the stored procedure. Let me execute the sp.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO

EXEC [dbo].[spSelectEmployeeDetails] @Education = N'Masters Degree', @Occupation = N'Management';
GO
-- OR You Can Write
EXEC [dbo].[spSelectEmployeeDetails] @Occupation = N'Professional',  @Education = N'Bachelors';
GO

-- OR You Can Write. Order should be same as you mentioned while creating Stored Procedure
EXEC [dbo].[spSelectEmployeeDetails] N'Bachelors', N'Professional';
GO

Input Parameters in SQL Stored Procedure Insert Statement

In this example, we show how to use the Input Parameters in Insert Stored procedures. Please refer to Insert Stored Procedure in SQL article to understand, How to write Insert Statement inside a stored procedure.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO
CREATE PROCEDURE [dbo].[spInsertEmployeeDetails]
	@FirstName varchar(100),
	@LastName nvarchar(100),
	@Education nvarchar(200),
	@Occupation nvarchar(200),
	@YearlyIncome float,
	@Sales float
AS
BEGIN
  BEGIN TRY
    BEGIN TRANSACTION;
	INSERT INTO [EmployeeDuplicates]
	   ([FirstName], [LastName], [Education], [Occupation], [YearlyIncome], [Sales], [HireDate])
	VALUES (@FirstName, @LastName, @Education, @Occupation, @YearlyIncome, @Sales, GETDATE())
	COMMIT TRANSACTION;
  END TRY
  BEGIN CATCH
	IF @@TRANCOUNT > 0
	   ROLLBACK TRANSACTION;
	   THROW;
  END CATCH
END

Let me execute the stored procedure. Here you can avoid the parameter names. Still, you have to provide parameter values in the same order that you specified while creating a procedure.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO

EXEC  [dbo].[spInsertEmployeeDetails]
	@FirstName = 'Tutorial',
	@LastName = 'Gateway',
	@Education = 'Masters Degree',
	@Occupation = 'Management',
	@YearlyIncome = 120000,
	@Sales = 4580.987

Let me show you the table.

Input Parameters in SQL Stored Procedure Update Statement

This example shows how to use the Input Parameters in Update Stored procedures. Please refer to Update Stored Procedure in SQL article to understand, How to write Update Statement inside a stored procedure.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO
CREATE PROCEDURE spUpdateEmployeeDetails
        @Occupation VARCHAR(50),
		@Sales FLOAT
AS
BEGIN
  BEGIN TRY
    BEGIN TRANSACTION;
	SET NOCOUNT ON;
	UPDATE [EmployeeDuplicates] 
	    SET [FirstName] = N'SQL',
		[LastName] = N'Tutorial',
		[YearlyIncome] = 150000
	    WHERE [Occupation] = @Occupation OR 
		  [Sales] >= @Sales	 
	COMMIT TRANSACTION;
  END TRY
  BEGIN CATCH
    IF @@TRANCOUNT > 0
    ROLLBACK TRANSACTION;
	   THROW;
  END CATCH
END

The following are the number of ways you can execute the stored procedure. Let me execute the sp with input parameters.

-- Example for SQL Stored Procedure with Input Parameters
USE [SQL Tutorial]
GO

EXEC [dbo].[spUpdateEmployeeDetails] @Sales = 4580.987, @Occupation = N'Management';
GO
-- OR You Can Write
EXEC [dbo].[spUpdateEmployeeDetails] @Occupation = N'Management',  @Sales = 4580.987;
GO

-- OR You Can Write. Order should be same as you mentioned while creating Stored Procedure
EXEC [dbo].[spUpdateEmployeeDetails] 4580.987, N'Management';
GO

Let me show you the table.