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2 rows affected
| id | stage | r | t |
|---|---|---|---|
| p1 | 1 | 1 | a |
| p1 | 1 | null | null |
| p1 | 1 | null | null |
| p1 | 2 | 1 | b |
| p1 | 2 | 1 | c |
| p1 | 2 | 2 | d |
| p1 | 3 | 1 | b |
| p1 | 3 | null | null |
| p1 | 3 | null | null |
| p2 | 1 | 1 | a |
| p2 | 1 | null | null |
| p2 | 2 | 1 | b |
| p2 | 2 | 1 | c |
| p2 | 3 | 1 | b |
| p2 | 3 | null | null |