MySQL exact URL search - php

Question

So I'm trying to merge two databases of company information (Table A and Table B from here on out) where the most common (and reliable) single reference point is the website URL. Table A is up-to-date, and Table B is to be updated.
I've extracted the URLs from Table A and cleaned them up using PHP (about 6000 URLs) and the plan is to find and update some information in Table B based on the URLs found (but not the URL itself).
In Table A the URLs are all either domain.com or www.domain.com or www.subdomain.domain.com without http:// or any trailing /'s or other URL data. In Table B they are raw URLs which might contain any extra information with them such as http:// etc.
Now I've tried searching for the company by the URL in Table B like so:
SELECT * FROM companies WHERE website LIKE '%$url1%' OR website LIKE '%$url2%'...
While this works, it is also pulling out information that isn't correct. For example, I don't have bt.com (or any variation of) in the list from Table A, yet it is matching on it in Table B (there is a www.corporate.bt.com in Table A which I think it is matching on).
So, how can I stop this from happening? It's clearly finding something LIKE it in the URL list, but I only want to match on the exact string. So in the example above, if I'm searching for www.corporate.bt.com it should only return that if it finds it within a string (http://www.corporate.bt.com/ is fine, http://bt.com/ is not)
Also, what would be the best possible way of performing this action with a dataset this large? Table A has around 6,000 URLs, Table B has 14,000 (not all of Table A will be in Table B).

Answer 1

LIKE won't return exact search but you can use MySql REGEXP for exact search, it will find exact result in search filed and return only exact url
SELECT * FROM companies WHERE website REGEXP '[[:<:]]$url1[[:>:]]' OR
website REGEXP '[[:<:]]$url2[[:>:]]'
Or if filed have only single url then you can use = operator
SELECT * FROM companies WHERE website = '$url1' OR website = '$url2'
UPDATE
In this you can expend REGEX serarch and input only SERVER_NAME e.g domain.com, domain1.com, abc.domain.com, see below query
$url = "doamin.com";
$url1 = "domain1.com";
SELECT * FROM companies WHERE
website REGEXP '^(htt(p|ps):\/\/|htt(p|ps):\/\/www\.)($url)$' OR
website REGEXP '^(htt(p|ps):\/\/|htt(p|ps):\/\/www\.)($url1)$'

Answer 2

So it turns out that I hadn't filtered through the list of address' in Table A well enough, and it appears that a url of 'http' had slipped through - which meant that every url that contained 'http' was being found...
So I added another filter which checked for the presence of a . in the URL, which ensured that it was at least something.something
if (strpos($domain, ".") !== false) {
// It has a .±
}