Morning Jeff,
You can have more than one client installed on a machine
with no problems.
If I might expand a little.
You can have more than one version of Oracle INSTALLED with no problems.
What you cannot do, without asking for trouble, is have more than one
version on the %PATH% at the same time.
Some versions may live happily together on %PATH% but most, in my
opinion, do not.
On Unix (assorted flavours) we have the lovely 'oraenv' which allows us
to swap and change ORACLE_HOMES almost willy nilly as it makes sure that
we don't have a mix-and-match of Oracle versions lying around on $PATH
at the same time. I've seen a mix of 9206 and 9208 causing troubles in
the past - because some numpty hard coded a 9206 setting in .profile,
and when we changed to a 9208 database, it fell over.
On Windows under 9i we used to have the Oracle Home Selector which was a
nice utility to do a Windows version of oraenv. Unfortunately (for us
here) it didn't remove Oracle 7 client (don't ask!) when it swapped 9i
versions over because it doesn't recognise anything below 8i or above
9i.
I have a vague remembrance that with 10g, there is a similar utility -
but it's part of the 10g installer, and not a separate utility in it's
own right. (I don't have a 10g client installed at the moment - other
than XE - so I can't check.)
Don't have multiple versions of Oracle client on %PATH% (or $PATH) at
the same time.
Cheers,
Norm. [TeamT]
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