You might come with a scenario where you need to use if condition when there are two possible cases occur. For example, when you develop a program or website, you want to do some sort of scheduling that can synchronize your current records with the existing data. In this tutorial, we will show you how you can simply create a stored procedure that will accept some sample data and will check if they are already exist then perform an update otherwise it will just insert a new record.
Let's say we have the following example table with those columns:
The sample stored procedure we create will check if the Name is already exists. Note on this stage, we don't pass the ID as we just want to show you how it works.
CREATE PROCEDURE SyncData @Name nvarchar(100), @Value nvarchar(200) AS /*** We declare a variable ID ***/ DECLARE @ID INT /*** We search the ID based on the given name ***/ Select @ID = ID FROM tblData Where Name = @Name IF @ID > 0 /*** If the ID is found we perform an update ***/ BEGIN UPDATE tblData SET Value = @Value WHERE ID = @ID END ELSE /*** ID is not found then we insert the data. We assume the ID is Identity Field (automatically insert in this case) ***/ BEGIN INSERT INTO tblData( Name , Value )VALUES( @Name , @Value ) END