left_col,right_col,sample_type
Day,Date,P
Day,Year,P
Day,Month,P
Day,MonthNo,P
Timestamp,kWh,N
Timestamp,Index,N
Timestamp,kW,N
kWh,Timestamp,N
kWh,Day,N
kWh,Index,N
kWh,Date,N
kW,Day,N
kW,kWh,N