formula for computed column based on different table’s column

May 1, 2023 by Tarik

You could create a user-defined function for this:

CREATE FUNCTION dbo.GetValue(@ncode INT, @recid INT)
RETURNS INT
AS 
   SELECT @recid * nvalue 
   FROM c_const 
   WHERE code = @ncode

and then use that to define your computed column:

ALTER TABLE dbo.YourTable
   ADD NewColumnName AS dbo.GetValue(ncodeValue, recIdValue)