Every day you arrive in workspace with the same items—a cell phone, briefcase and/or purse, mail, keys, and change.
每天你都带着同样的东西进入工作区——一只手机、公文包和/或者手提包、邮件、钥匙、零钱。
2
Anyone with a relational data background knows that their primary keys really shouldn't change, as it's expensive to propagate that change to foreign keys.
任何有关系型数据库背景的人都知道主键实际上不会改变,因为要把其更改传播到外键是很昂贵的工作。
3
Database structure change to remove search path from primary keys.