ORDER BY ok DESC FROM parsed ) AS no_dup WHERE no_dup.row_number = 1 • Merge/Upsert 模式，步骤3 目标表删除 PK 匹配行 DELETE FROM table USING temp_table WHERE table.pk = temp_table.pk • Merge/Upsert 模式，步骤4 插入目标表，完成