Hi,

I need to create a system that if a user signs up it will check if this user is already signed up.

it will check sometimes by phone number

somtimes on address and firstname

sometimes on addres and lastname

sometime on lastname and city and address.

sometimes for the customer ID.

so how would I use regex to check if there is a similar record alread for it.

The customer records are stored in a sql database 

RNBY