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POMySQL ONLY IN() equivalent clause
 

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    <p>I am giving a very abstract version of my question here, so please bear with me. I have a query that will check whether a particular body has certain multiple parameters of same type. Example, a boy has multiple selection as far as chocolates are concerned. But, I want to choose boys from the table who have exactly the chocolates I mention. Not more not less and not 'LIKE' or not 'IN()'.</p> <pre><code>SELECT boy_id from boys_chocolates WHERE chocolate_id ONLY IN('$string'); </code></pre> <p>..where of course '$string' is a PHP variable containing comma separated values of only those chocolates I want to use to pull the boys.</p> <p>I know this is invalid MySQL statement, but is there any valid equivalent to this?</p> <p>EDIT:</p> <p>This is more comprehensive query which gets records in special cases, but not always.</p> <pre><code>SELECT boys.* FROM schools_boys INNER JOIN boys ON boys.boy_id=schools_boys.boy_id INNER JOIN chocolates_boys a ON a.boy_id=boys.boy_id INNER JOIN schools ON schools.school_id=schools_boys.school_id WHERE a.chocolate_id IN(1000,1003) AND EXISTS ( SELECT 1 FROM chocolates_boys b WHERE a.boy_id=b.boy_id GROUP BY boy_id HAVING COUNT(DISTINCT chocolate_id) = '2' ) GROUP BY schools_boys.boy_id HAVING COUNT(*) = '2' Boys Table +--------+-------------+ | id | boy | +--------+-------------+ | 10007 | Boy1 | | 10008 | Boy2 | | 10009 | Boy3 | +--------+-------------+ Chocolates Boys Table +----+---------+--------------+ | id | chocolate_id | boy_id | +----+--------------+---------+ | 1 | 1000 | 10007 | | 2 | 1003 | 10007 | | 3 | 1006 | 10007 | | 4 | 1000 | 10009 | | 5 | 1001 | 10009 | | 6 | 1005 | 10009 | +----+--------------+---------+ </code></pre> <p>Nothing happens when I select 1000 alone to pull two boys (or) 1000 and 1003 to pull out the boy with ID 10007.</p>
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