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    <p>@fthiella 's solution is very elegant.</p> <p>If in future you want show more than <code>user_id</code> you could use joins, and there in one line could be all data you need.</p> <p>If you want to use <code>AND</code> conditions, and the conditions are in multiple lines in your table, you can use <code>JOINS</code> example:</p> <pre><code>SELECT `w_name`.`user_id` FROM `wp_usermeta` as `w_name` JOIN `wp_usermeta` as `w_year` ON `w_name`.`user_id`=`w_year`.`user_id` AND `w_name`.`meta_key` = 'first_name' AND `w_year`.`meta_key` = 'yearofpassing' JOIN `wp_usermeta` as `w_city` ON `w_name`.`user_id`=`w_city`.user_id AND `w_city`.`meta_key` = 'u_city' JOIN `wp_usermeta` as `w_course` ON `w_name`.`user_id`=`w_course`.`user_id` AND `w_course`.`meta_key` = 'us_course' WHERE `w_name`.`meta_value` = '$us_name' AND `w_year`.meta_value = '$us_yearselect' AND `w_city`.`meta_value` = '$us_reg' AND `w_course`.`meta_value` = '$us_course' </code></pre> <p>Other thing: Recommend to use prepared statements, because <code>mysql_*</code> functions is not SQL injection save, and will be deprecated. If you want to change your code the less as possible, you can use <code>mysqli_</code> functions: <a href="http://php.net/manual/en/book.mysqli.php" rel="noreferrer">http://php.net/manual/en/book.mysqli.php</a></p> <p>Recommendation:</p> <p>Use indexes in this table. <code>user_id</code> highly recommend to be and index, and recommend to be the <code>meta_key</code> AND <code>meta_value</code> too, for faster run of query.</p> <p>The explain:</p> <p>If you use <code>AND</code> you 'connect' the conditions for one line. So if you want AND condition for multiple lines, first you must create one line from multiple lines, like this.</p> <p>Tests: Table Data:</p> <pre><code> PRIMARY INDEX int varchar(255) varchar(255) / \ | +---------+---------------+-----------+ | user_id | meta_key | meta_value| +---------+---------------+-----------+ | 1 | first_name | Kovge | +---------+---------------+-----------+ | 1 | yearofpassing | 2012 | +---------+---------------+-----------+ | 1 | u_city | GaPa | +---------+---------------+-----------+ | 1 | us_course | PHP | +---------+---------------+-----------+ </code></pre> <p>The result of Query with <code>$us_name='Kovge'</code> <code>$us_yearselect='2012'</code> <code>$us_reg='GaPa'</code>, <code>$us_course='PHP'</code>:</p> <pre><code> +---------+ | user_id | +---------+ | 1 | +---------+ </code></pre> <p>So it should works.</p>
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    1. POMySQL select query with multiple conditions
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    1. COWhy was this downvoted? It's the right answer, joins are the way to go in this case.
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    2. COBecause the other answer writes did not understand the question :)
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    3. COnot seems working
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