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POHow to get the number of results MySql would have returned without limit?
 

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  1. POHow to get the number of results MySql would have returned without limit?
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    <p>I have a table with a lot of data, so I retrieve it and display it one page at a time (my request is lengthy so there is no way I run it on the entire table).</p> <p>But I would like to paginate the results, so I need to know what is the total number of elements in my table. </p> <p>If I perform a <code>COUNT(*)</code> in the same request, I get the number of selected elements (in my case, 10).</p> <p>If I perform a <code>COUNT(*)</code> on my table in a second request, the result might be wrong because of the where, join and having clauses in my main query.</p> <p>What is the cleanest way to:</p> <ul> <li>Retrieve the data</li> <li>Know the maximum number of elements in my table for this specific request</li> </ul> <hr> <p>One solution seems to be using the <a href="http://dev.mysql.com/doc/refman/5.1/en/information-functions.html#function_found-rows" rel="nofollow noreferrer">Mysql function FOUND_ROWS</a> :</p> <p>I tried this, as mysql_query performs one query at a time: (taken <a href="https://stackoverflow.com/a/3453823/311744">here</a>)</p> <pre><code>$query = 'SELECT SQL_CALC_FOUND_ROWS * FROM Users'; $result = mysql_query($query); // fetching the results ... $query = 'SELECT FOUND_ROWS()'; $ result = mysql_query($query); // debug while ($row = mysql_fetch_row($result)) { print_r($row); } </code></pre> <p>And I got an array with 0 results:</p> <pre><code>Array ( [0] =&gt; 0 ) </code></pre> <p>Whereas my query does returns results.</p> <p>What is wrong with my approach ? Do you have a better solution ?</p>
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    1. USCommunity
    1. USBenjamin Crouzier
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    1. CO`mysql_num_rows()` ?
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      1. POHow to get the number of results MySql would have returned without limit?
      1. USMihai Iorga
    2. COYou did not store the results to $result variable anywhere ...
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      1. POHow to get the number of results MySql would have returned without limit?
      1. USVafliik
    3. CO@MihaiIorga mysql_num_rows is affected by the LIMIT clause. In my case, it returns 10.
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      1. POHow to get the number of results MySql would have returned without limit?
      1. USBenjamin Crouzier
 

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