I created a custom table in my modules .install file and I am asking for some form input in a custom made configuration file. I am unable to retrieve that data and print it out in a custom callback page that i created for testing. I’m not quite sure what i am doing wrong.

<?php /* mymodule.install */ function mymodule_schema(){   $  schema['mymodule'] = array(     'description' => 'Table for testing',     'fields' => array(       'pmid' => array(         'type' => 'int',         'unsigned' => TRUE,         'not null' => TRUE,         'default' => 0,       ),       'field_one' => array(         'description' => 'Field 1',         'type' => 'varchar',         'length' => 255,         'not null' => TRUE,         'default' => ''       ),       'primary key' => array('pmid'),       'unique keys' => array(         'pmid' => array('pmid'),       ),      ),    );  /* mymodule.module */ function mymodule_form_submit($  form, &$  form_state){   db_insert('mymodule')   ->fields(array(     'field_one' => $  form_state['values']['field_one'],     'pmid' => 1,   ))->execute(); }  function mymodule_print_table(){ $  result = db_select('mymodule', 'mm')        ->fields('field_one')         ->execute()        ->fetchAll(); var_dump($  result); } 

This prints an empty array for me.