Selecting records based on ID

[eluser]RS71[/eluser]
Hey,

I'm trying to select some records from the database based on their ID. Normally I'd just do

Code:

SELECT * FROM table WHERE table.ID = 1

I'm gonna be storing all the possible IDs in a session variable; would I just append a

Code:

...OR table.ID = 2 OR table.ID = 3 (etc)

or is there a better way to do this? Would I have some problems if I need to retrieve some 50 different rows from the table?

Thanks in advance.