StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
SQL constraint on existing table - unique combination of values only when another column is null
| Author | Votes | Δ |
|---|---|---|
| TOUZENE Mohamed Wassim | 1 | 0.00 |
Last visited: Nov 8, 2017, 7:12:31 PM