visit_occurrence_id</span>
    </td>
    <td class='constraint detail'>fpk_drug_visit<span title='Restrict delete:
 Parent cannot be deleted if children exist'>&nbsp;R</span></td>
   </tr>
  </table>
 </td>
 <td class='comment detail'>A foreign key to the visit in the visit table during which the Drug Exposure was initiated.</td>
</tr>
<tr class='even'>
 <td class='indexedColumn' title='Indexed'>visit_detail_id</td>
 <td class='detail'>int4</td>
 <td class='detail' align='right'>10</td>
 <td class='detail' 