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POHow can I search for an a list of words in a table of words that associate to another table?
 

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  1. POHow can I search for an a list of words in a table of words that associate to another table?
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    <p>Below are 3 tables I have setup. The 'words' and 'word_part_mapping' tables are generated automatically by indexing all of the words in the part's name from the parts table.</p> <pre><code>//'parts' table +----------+--------------+ | part_num | part_name | +----------+--------------+ | 10111 | front bumper | | 10112 | rear bumper | +----------+--------------+ //'words' table +------+------------+ | id | word | +------+------------+ | 1 | front | | 2 | bumper | | 3 | rear | +------+------------+ //'word_part_mapping' association table +---------+----------+ | word_id | part_num | +---------+----------+ | 1 | 10111 | | 2 | 10111 | | 3 | 10112 | | 1 | 10112 | +---------+----------+ </code></pre> <p>How can I query this if the user searches for "front bumper" and I want the query to return results containing ALL words that the user searched for?</p> <pre><code>SELECT p.* FROM words w LEFT JOIN word_part_mapping wpm ON w.id=wpm.word_id LEFT JOIN parts p ON wpm.part_num=p.part_num WHERE w.word='front' AND w.word='bumper' </code></pre> <p>Obviously, the above query does not work because the word cannot equal both 'front' and 'bumper'. This works if I do OR, however I do not want that because it returns too many results (50,000+ parts in database).</p> <p>==============================================</p> <p>EDIT: Got it working finally... </p> <pre><code>SELECT p.* FROM words w LEFT JOIN word_part_mapping wpm ON w.id=wpm.word_id LEFT JOIN parts p ON wpm.part_num=p.part_num WHERE w.word IN('front','bumper') GROUP BY p.part_num HAVING COUNT(DISTINCT w.word) = 2 </code></pre> <p>where 2 is the number of terms the user is searching</p>
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    1. USBrandon Rohde
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