获取spark sql中上次特定月份的结果的最简单方法是什么？

Question

I have a month as an input and need to generate sql query that will get results for that month last occurrence - so previous or current year depending on the month - but I want it to be as human readable as possible. Tried this but it wont work as you can't use CASE that way:

WHERE month(DateF) = 11
AND year(DateF) = (
CASE WHEN 11 > month(CURRENT_DATE) 
THEN year(CURRENT_DATE)-1
ELSE year(CURRENT_DATE)
)

Answer 1

You can use the Spark SQL in-built functions to work with date and time. These functions give capability to work with different dates, in different formats.

Refer: https://www.obstkel.com/spark-sql-date-functions

Answer 2

I think you can do that by using current_date and a day column (if you have it):

WHERE month(dateF) = X AND day >=  date_add(current_date(), -365)

Will this be possible for you ?