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✓
| store | item | value |
|---|---|---|
| store1 | item1 | 0 |
| store1 | item2 | 0 |
| store1 | item1 | 1 |
| store1 | item2 | 1 |
| store1 | item1 | 2 |
| store1 | item2 | 2 |
| store1 | item2 | 3 |
✓
| store | item | value |
|---|---|---|
| store1 | item1 | 0 |
| store1 | item2 | 0 |
| store1 | item1 | 1 |
| store1 | item2 | 1 |
| store1 | item1 | 2 |
| store1 | item2 | 2 |
| store1 | item2 | 3 |