title: SELECT - Split content of field
body: <p>my table</p>
  
  <pre><code>id | email  | values
  1  | a@a    | 2,3,
  2  | b@b    | 1,3,
  3  | c@c    | 2,
  </code></pre>
  
  <p>How to compare the numbers in the VALUES field with those in the ID</p>
  
  <pre><code>$sql = "SELECT * FROM table WHERE email = 'c@c' AND id NOT LIKE (each id column) ";
  </code></pre>
  
  <p>result = ID 1</p>