PL/SQL: Passing arguement to IN fcn

[JGenshlea]

Hello,

I am a newbee to PL/SQL - and Oracle development for that matter. Anyway I need to pass a string to a procedure that will be used in a IN Clause:

execute procedure UPDATE_DDT(NAME, '1,2,3');

PROCEDURE UPDATE_DDT(NAME_IN IN VARCHAR2, UPDATE_IN IN VARCHAR2)
IS
UPDATE DEVICE_DETAIL_TICKET
SET NAME = NAME_IN
WHERE ID IN (UPDATE_IN);
END UPDATE_DDT;


THIS procedure gives me an error unless I pass it a single number. eg. the statement
execute procedure UPDATE_DDT(NAME, '1');
executes correctly.

Any ideas how to get this to work?

Thank you