Sql 如何查看行之间的更改？

我有一张看起来像的桌子

object_id   attribute_1    attribute_2    attribute_3
1           a              a              a
1           a              a              a
1           a              b              a
1           a              a              a
2           z              z              z
2           w              z              z

我想了解用户对这些对象所做的更改。一个潜在的最终结果可能是一个对象表，其中的属性被更改的次数，以及对象被记录的总次数，如下所示：

object_id   attribute_1    attribute_2    attribute_3   count
1           0              2              0             3
2           1              0              0             2

---

我将如何做到这一点？量化和理解所做更改的其他潜在方法有哪些？

如果在将属性更改回以前的值时不需要将更改计算在内，则可以按对象id和属性分组，以获得该属性的不同值的数量

我建议您编写一个应用程序或一个过程来计算您想要的内容。但是，如果您只想通过一个查询来解决问题，那么应该是这样的：

SELECT object_id,
       sum(changes_attribute_1) AS changes_attribute_1,
       sum(changes_attribute_2) AS changes_attribute_2
FROM
  ( SELECT object_id,
           sum(IF(atribute = 2,changes,0)) AS changes_attribute_2,
           sum(IF(atribute = 1,changes,0)) AS changes_attribute_1
   FROM
     (SELECT count(*)-1 AS changes,
             object_id,
             1 AS atribute
      FROM
        (SELECT count(*),
                object_id
         FROM TABLE AS inner_table
         GROUP BY object_id,
                  attribute_1) AS tudo
      GROUP BY object_id
      UNION ALL SELECT count(*)-1 AS changes,
                       object_id,
                       2 AS atribute
      FROM
        (SELECT count(*),
                object_id
         FROM TABLE AS inner_table
         GROUP BY object_id,
                  attribute_2) AS tudo
      GROUP BY object_id) AS tudo
   GROUP BY object_id,
            atribute) AS tudo2
GROUP BY object_id

我已尝试使用此表进行查询：

object_id, attribute_1, attribute_2
1, 1, 1
1, 2, 1
1, 3, 2
2, 1, 1
2, 2, 2
2, 3, 4

我得到了这个结果

# object_id, changes_attribute_1, changes_attribute_2
1, 2, 1
2, 2, 2