表: Person +-------------+---------+| Column Name | Type |+-------------+---------+| id | int || email | varchar |+-------------+---------+id 是该表的主键(具有唯一值的列)。此表的每一行都包含一封电子
题目: 表: Person +-------------+---------+| Column Name | Type |+-------------+---------+| id | int || email | varchar |+-------------+---------+id 是该表的主键列(具有唯一值的列)。该表的每一行包含