Update SQL Server stored procedure - switch columns in the parameters - sql

Question

I am trying to create a basic stored procedure as below:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[spUpdate1]
#registration_id NCHAR(8),
#registration_status INT
AS
BEGIN
UPDATE dbo.Test1
SET Registration_Status = #registration_status
WHERE Registration_id = #registration_id;
END
This stored procedure works without issue, however the registration_id isn't the parameter I would like to pass in.
I have a three columns in my table:
Reference_Number, Registration_id, Registration_Status
I would like to be able to pass in the Reference_Number as the parameter, from here the statement selects the registration_id from the relevant row in the table, then this is passed to the update statement to perform the update

Answer 1

Based on your comment you can probably do this;
ALTER PROC [dbo].[spUpdate1]
#registration_status int,
#reference_number nvarchar(max)
AS
BEGIN
UPDATE t1
SET registration_status = #registration_status
FROM dbo.Test1 t1
WHERE CAST(t1.reference_number as NVARCHAR(MAX)) = #reference_number
END
Although I recommend changing the data type of Reference_Number to nvarchar(max) instead of text...

Answer 2

this is what you wanted ? based on Reference_Number to get the Registration_id ?
ALTER PROC [dbo].[spUpdate1]
#registration_id nchar(8),
#registration_status int,
#Reference_Number nchar(8) -- added this
AS
BEGIN
update t2
set Registration_Status = #registration_status
from dbo.Test1 t1
inner join dbo.Test1 t2 on t1.Registration_id = t2.Registration_id
where t1.Reference_Number = #Reference_Number
END