Social Engine 4-Get values from a table

//gets a table called engine4_authorization_permissions

$permissionTable=Engine_Api_()->getDbTable('permissions','authorization');

$permissionSelect=$permissionTable->select()->where('level_id'=?,$userlevel)->where('type'=>'usercommit');

$fetchdata=$permissionTable->fetchrow($permissionSelect);

$fetchdatas=$permissionTable->fetchrows($permissionSelect);
//To get attribute from row

echo $fetchdata->attribute_name

foreach($fetchdatas as $fetchdata)
{
     echo $fetchdata->attribute_name;
}