Look for several values in several value in SQL
<p>Here is the rather particular problem :</p>

<pre><code> id |   column_num   |
 ---|----------------|
   1|  5,12,64,7,78  |
   2|  5,53,7,6      |
   3|  94,78,32,27   |
</code></pre>

<p>I need to find lines having the values : 12, 7, 78</p>

<p>I need to look for several values corresponding to a cell SQL.
I use MySQL. You have an idea?</p>

<p>Thank you</p>