StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
How to join two tables on two columns normally, but if one of columns contain null, then result m...
| Author | Votes | Δ |
|---|---|---|
| Amit Singh | 2 | +1.50 |
| Rahul | 1 | -1.50 |
Last visited: Apr 28, 2015, 9:46:52 AM