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Answers and rating deltas for
Why primary key cannot contain null values?
| Author | Votes | Δ |
|---|---|---|
| velocity | 2 | +4.34 |
| Sagar Joon | 1 | +0.24 |
| Mureinik | 1 | -0.10 |
| vishal | -1 | -3.76 |
Last visited: May 1, 2015, 10:00:58 PM