Convert raw sql to ZF2 statement - mysql

Question

In zf2, how can i write following mysql query and execute it. ??
SELECT * FROM `user_modules` um JOIN ((SELECT vm.id, vm.module_code, vm.module_title,'video' AS type FROM video_master vm WHERE vm.is_deleted = 0) UNION (SELECT sm.id, sm.module_code, sm.module_title, 'slideshow' AS type FROM slideshow_master sm WHERE sm.is_deleted = 0) result ON um.module_id = result.id
WHERE um.user_id='3'

Answer 1

I found solution!!
$userId = '1';
$select = "SELECT * FROM `user_modules` um JOIN ((SELECT vm.id, vm.module_code, vm.module_title, 'video' AS type FROM video_master vm WHERE vm.is_deleted = 0) UNION (SELECT sm.id, sm.module_code, sm.module_title, 'slideshow' AS type FROM slideshow_master sm WHERE sm.is_deleted = 0)) temptable on um.module_id = temptable.id where um.user_id='". $userId ."'";
$resultSet = $this->adapter->query($select);
return $data = $this->resultSetPrototype->initialize($resultSet->execute())->toArray();
OR else can use ZF2 method:
$sql = new Sql($this->getAdapter());
$select = $sql->select()->from(array('um' => $this->table));
Get all slideshow modules
$select1 = $sql->select(array())->from(
array("slideshow" =>'slideshow_master'))
->columns(array('id','module_code','module_title',"type" => new Expression("'Slideshow'")));
$select1 = $sql->select(array())->from(
array("slideshow" =>'slideshow_master'))
->columns(array('id','module_code','module_title',"type" => new Expression("'Slideshow'")));
$select1->where("slideshow.is_deleted = 0");
$select1->order("slideshow.id");
Get all video modules
$select2 = $sql->select(array())->from(
array("video" => 'video_master'))
->columns(
array('id','module_code','module_title',"type" => new Expression("'Video'")));
$select2->where("video.is_deleted = 0");
$select2->order("video.id");
union of two first selects
$select1->combine ( $select2, 'UNION' );
$select->join(array('result' => $select1), "result.id = um.module_id");
$select ->where("um.user_id='". $userId. "'");
$statement = $sql->prepareStatementForSqlObject($select);
return $this->resultSetPrototype->initialize($statement->execute())->toArray();
Sorry for my typing and formatting.