public void linkPhenomenonToOffering(){
		try {
			String tableName = "phen_off";
			String firstCol = "phenomenon_id";
			String secondCol = "offering_id";
			databaseCon dbCon = new databaseCon();
			//co 
			dbCon.linkTwoTables(tableName, firstCol, secondCol, aqeSensors.getCoPhenomenon(), aqeSensors.getCoOffering());
			//humidity 
			dbCon.linkTwoTables(tableName, firstCol, secondCol, aqeSensors.getHumidityPhenomenon(), aqeSensors.getHumidityOffering());
			//NO2 
			dbCon.linkTwoTables(tableName, firstCol, secondCol, aqeSensors.getNo2Phenomenon(), aqeSensors.getNo2Offering());
			//temperature
			dbCon.linkTwoTables(tableName, firstCol, secondCol, aqeSensors.getTemperaturePhenomenon(), aqeSensors.getTemperatureOffering());
			//O3
			dbCon.linkTwoTables(tableName, firstCol, secondCol, aqeSensors.getO3Phenomenon(), aqeSensors.getO3Offering());
		
			dbCon.disconnect();
		} catch (FileNotFoundException e) {
			logger.warn("Config file for database connection not found",e);
			e.printStackTrace();
		} catch (IOException e) {
			logger.warn(e);
			e.printStackTrace();
		}
	}