title: Select the column name of a table which is auto increment
body: <p>How can i get the column name of a table which is auto increment?</p>
  
  <p>i have a code to get all my table</p>
  
  <p>and i want to select each of their auto increment column.</p>
  
  <pre><code>   $tables = $this-&gt;sql("SHOW TABLES");
  
     foreach($tables as $tb)
     {
  
         //here i waant to select the  auto increment of the table
     }
  </code></pre>
  
  <p>how can i do that?</p>