Best practice using in-clause in sql server 2005


I have an  update statement with where condition as follows

update tableA
set c1='cccc'
where id in ( x number of ids )

In the above where condition if  suppose I have 50 id's , do i need hard code all the id's  or
is there any best approach  to do this with good performance.

Any help would be appreciated.
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
>if  suppose I have 50 id's
where do those "id" values come from.

the answer to your question lies in that information.
if it comes from a user input, check this article:

if it is a "hard-coded list", which might though vary, I would put the list into a table, and do:
update tableA
set c1='cccc'
where id in ( select id from that_lookup_table )

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dsk1234Author Commented:
Id's are hard coded list  , but the list (ids) are not specific to one table.I just need to update the column for all hard codes ids.

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Microsoft SQL Server 2005

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