How to validate numbers in char field.

Hello all,
I have one database column with char data type. This field should allow insert only
numbers [ zero to nine] and plus symbol .. how to validate this?
Pls help me..
I.m using oracle 9i database. So it does not allow REG-EXP and WITH methods.. So give some
sql coding to do this

As this forum is for issues with the SQL Developer tool, you'll probably get more answers in the SQL And PL/SQL forum.
Regards,
K.

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