alexdwhite

-- This can be performed numerous ways, and can also be performed more efficiently, but I broke out the 
-- sections so that they are easy to identify and understand

-- create temp table
declare @tbl table (id int identity, valueA int)

-- used for the loop
declare @ptr int, @max int, @valueA int

-- insert list of ID's into temp table

alexdwhite

update 
  a 
set 
  a.Field1 = b.Field1, 
  a.Field2 = b.Field2
from tableA a 
  inner join tableB b on a.fKey = b.pKey 
where a.pKey = @someValue

alexdwhite

-- create the function in SQL

CREATE FUNCTION [dbo].[GetCardType] (@CardNum varchar(100))
RETURNS varchar(10)
AS
BEGIN
	DECLARE @type varchar(10) 
	
	if (left(@CardNum, 1) = '4')
		begin