How do I get similar domains from database using tags?

I do have 100k domain names with tags... table has got only two column called domain and tags.

Tags开发者_Python百科 are stored with coma after each tags. I want fine how many domains with similar tags say search,google,searchengine,engine,web,reference with all of them or any of them in it. How do I do it?

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Without knowing exactly how you want to implement this, here's some SQL to get you started:

SELECT *
FROM domains
WHERE 
  tag LIKE '*search*' OR
  tag LIKE '*google*' OR
  tag LIKE '*searchengine*' OR
  tag LIKE '*engine*' OR
  tag LIKE '*web*' OR
  tag LIKE '*reference*'