StackRating

An Elo-based rating system for Stack Overflow
Home   |   About   |   Stats and Analysis   |   Get a Badge
Answers and rating deltas for

How can I group records and do calculations between first and last records in each group using Oracl

Author Votes Δ
Tim Williams 2 +1.55
Arkadiusz Ɓukasiewicz 0 -0.40
sagi 0 -1.16
Last visited: Aug 26, 2016, 2:34:25 PM