public function removeSelect($what) {
		foreach($this->columns as $alias=>$column) {
			if($alias === $what) {
				unset($this->columns[$alias]);
				break;
			}
		}
		return $this;
	}
public function removeSelect($what) {
		foreach($this->columns as $alias=>$column) {
			if($alias === $what) {
				unset($this->columns[$alias]);
				break;
			}
		}
		return $this;
	}
public function removeSelect ( $ what ) { foreach ( $ this -> columns as $ alias => $ column ) { if ( $ alias === $ what ) { unset ( $ this -> columns [ $ alias ] ) ; break ; } } return $ this ; }
Remove a SELECT column.
@param  string $what
@return DAL    $this
@api
Remove a SELECT column .