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An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    How to check same valid if id already exists in MySQL with PHP
| Author | Votes | Δ | 
|---|---|---|
| Jason W | 0 | +0.19 | 
| Interlated | 0 | -0.19 | 
Last visited: Sep 14, 2014, 5:07:29 AM