Want week number from different columns of Year, Month & Day

Question

I want week number from different columns of Year, Month & Day in same table of Hive QL. IF you can give logic on SQL, that's also fine.

Answer 1

Concatenate the date, month and year into a proper date format and apply weekofyear().

Select weekofyear(cast(concat(year,"-",month,"-",date) as date)) from tablename.

Please note that I have used cast to convert the concatenated string into date.Howver, you might need to use different method based on your date format. Please refer to the below answer on handling string conversion to date formats.

Hive cast string to date dd-MM-yyyy