MYSQL: Can you pull results that match like 3 out of 4 expressions?

Question

Say I have a query like this:

SELECT * FROM my_table WHERE name = \"john doe\" AND phone = \"8183321234\" AND email = \"johndoe@yahoo.com\" AND address = \"330 s         


        

Answer 1

Same thing using indexes:

SELECT  *
FROM    (
        SELECT  id
        FROM    (
                SELECT  id
                FROM    mytable _name
                WHERE   name = 'john doe'
                UNION ALL
                SELECT  id
                FROM    mytable _name
                WHERE   phone = '8183321234'
                UNION ALL
                SELECT  id
                FROM    mytable _name
                WHERE   email = "johndoe@yahoo.com"
                UNION ALL
                SELECT  id
                FROM    mytable _name
                WHERE   address = '330 some lane'
                ) q
        GROUP BY 
                id
        HAVING
                COUNT(*) >= 3
        ) di, mytable t
WHERE   t.id = di.id

See the entry in my blog for performance details.