Multiple condition filter on dataframe

Question

Can anyone explain to me why I am getting different results for these 2 expressions ? I am trying to filter between 2 dates:

df.filter(\"act_date <=\'2017         


        

Answer 1

In first case

df.filter("act_date <='2017-04-01'" and "act_date >='2016-10-01'")\
  .select("col1","col2").distinct().count()

the result is values more than 2016-10-01 that means all the values above 2017-04-01 also.

Whereas in second case

df.filter("act_date <='2017-04-01'").filter("act_date >='2016-10-01'")\
  .select("col1","col2").distinct().count()

the result is the values between 2016-10-01 to 2017-04-01.