Question

I have a web application and I am working on engine that analyzes referals.

Now I have table with pageviews along with referes that looks something like this:

pv_id        referer
------------------------------------------------------------
5531854534   http://www.google.com/search?ie=UTF-8...
8161876343   http://google.cn/search?search=human+rights
8468434831   http://search.yahoo.com/search;_...

The second table contains sources definitions like:

source       regex
------------------------------------------------------------
Google       ^https?:\/\/[^\/]*google\.([a-z]{2,4})(\/.*)?$
Yahoo        ^https?:\/\/[^\/]*yahoo\.com(\/.*)?$

What I want is third table created by joinin these two:

pv_id        source
------------------------------------------------------------
5531854534   Google
8161876343   Google
8468434831   Yahoo

How to join these tables with regular expression?

UPDATE:

Changed last part of regex from (\/.*|) to (\/.*)?.

Answer 1

Try this:

select t1.pv_id, t2.source
from table1 t1
  inner join table2 t2 on (t1.referer regexp t2.regex)