Question

I have this table, named Prospects :

+---------+-------------+
| Name    | PhoneNumber |
+---------+-------------+
|John     | 08199999    |
|Viona    | 08332222    |
+---------+-------------+

on the other hand I have this table too, named SMSD :

+-----------------+---------------+
| Message         | PhoneNumber   |
+-----------------+---------------+
|Hello World!     | [phone]    |
|Hi World         | [phone]    |
+-----------------+---------------+

now I need to do LEFT JOIN to that both tables based on PhoneNumber : Prospects.PhoneNumber = SMSD.PhoneNumber while on the SMSD table phone number always had country code prefix.

thanks!

Answer 1

select * from Prospects
left join SMSD on substring(SMSD.PhoneNumber, 4) = substring(Prospects.PhoneNumber, 2)

(Not tested)

This should remove the country code prefix from the SMSD phone number and the leading zero from the Prospects phone number before performing the join.