public function column($field)
    {
        $query = clone $this->_queryForWrite();

        return $query->select($field)->execute()->column($field);
    }
public function column($field)
    {
        $query = clone $this->_queryForWrite();

        return $query->select($field)->execute()->column($field);
    }
public function column ( $ field ) { $ query = clone $ this -> _queryForWrite ( ) ; return $ query -> select ( $ field ) -> execute ( ) -> column ( $ field ) ; }
Reduces a collection down to a single column
@chainable
Reduces a collection down to a single column