Hi all, My df looks like follows:
Situation: MainKey, SubKey, Val1, Val2, Val3, ... 1, 2, a, null, c 1, 2, null, null, c 1, 3, null, b, null 1, 3, a, null, c Desired outcome: 1, 2, a, b, c 1, 2, a, b, c 1, 3, a, b, c 1, 3, a, b, c How could I populate/synchronize empty cells of all records with the same combination of MainKey and SubKey with the respective value of other rows with the same key combination? A certain value, if not null, of a col is guaranteed to be unique within the df. If a col exists then there is at least one row with a not-null value. I am using pyspark. Thanks for any hint, Best Meikel
