A question!

Hi,
I have writen a script to import some data into my
databs tables, with the delimitor ','. Now my question
is sometime the data being sent to my tables might not
match the data type and I receive an error message.
One: how could I prevent that?
Two: how can I divert all my error messages to a
logfile, where I can see the errors later?
Thanks

Nico,
P.S: I hope I am makeing sense.

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