_diff | id | product | category | price | stock | updated_at
--------------+----+----------+-------------+-------+-------+---------------------
changed-left | 2 | Cable | electronics | 5 | 24 | 2025-01-01T08:00:00Z
changed-right | 2 | Cable | electronics | 5 | 20 | 2025-02-01T08:00:00Z
removed | 3 | Notebook | office | 3.2 | 50 | 2025-01-01T08:00:00Z
added | 4 | Pen | office | 1.5 | 80 | 2025-02-01T08:00:00Z