Table design for an indicator field in SQL Server 2008 R2

Question

Hi, I am using SQL Server 2008 R2 and I have an existing table (Please see the below table definition).
CREATE TABLE Code
ID INT IDENTITY (1, 1) PRIMARY KEY,
Code NVARCHAR(10) NOT NULL UNIQUE,
[Description] NVARCHAR(100) NOT NULL,
[Type] NVARCHAR(30) NULL,
Program NVARCHAR(30) NOT NULL, --Adding this column as a filter for different programs
ModifiedDate DATETIME NOT NULL DEFAULT (getdate()),
ModifiedBy NVARCHAR(128) NOT NULL DEFAULT (suser_sname())
This table has been in use for a while and I am adding a column [Program] to identify records for that program. Previously it used to be just one program and this [Code] table was working just fine now there are 5 different programs introduced in the organization
and this could keep changing over time.
For instance Program A uses Code A, Code B, Code C & Program B uses Code C, Code D, Code E & Program C uses Code C. I know of an option which works but creates maintenance overhead
everytime these programs change by doing something like below.
Code ProgramA ProgramB ProgramC ProgramD ProgramE
A      Yes
B      Yes
C      Yes           Yes           Yes
D                      Yes
E                       Yes
But, is there a better way to do this keeping 1 column for Program and users being able to manage their data without looking at other codes. I mean a user who manages Program A should be able
to see codes A, B, C & user managing Program B should see codes C, D, E & for Program C just code C.
Thanks in advance.....
Ione

Answer 1

I would add it as a seperate table with columns as
ProgramName  CodeName
the data would be like
ProgramName CodeName
ProgramA A
ProgramA B
ProgramA C
ProgramB C
ProgramB D
ProgramB E
ProgramC C
then its just a matter of adding a join from your above table to this table on Code field to get associated Program info and filter on it.
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