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Gary,
I have been known to disagree with Charles on assorted matters, but on this
one, he's absolutely correct.
If you have code somewhere in your application which directly concatenates
strings to form an SQL statement and one of those strings comes directly
from the user, you may be at risk of SQL injection (depending on the
specific strings). It doesn't matter whether this is in a top-level program
or some code in a module that's bound into a service program way deep in
your application.
As has been pointed out, you can mitigate/avoid this, by either using
parameters or by manually 'cleaning' the user-provided string yourself.
Rory
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