public Boolean makeQuery(String query){
		/*
		 * ektelei to query pou tou dinetai kai epistrefei an ektelesthke kai an oxi
		 */
		try {
			if(pS.executeUpdate()==0)
				return false;
			else
				return true;
		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}