| 释义 |
auxiliary key
辅助键
All or part of the contents of a field (other than primary key field) used to locate a record.Such a key typically identifies some attribute of the entity such as the discount classification of a customer or the data of purchase of a vehicle.
用来确定一个记录的一个字段(不是主键字段)的全部或部分内容。这种键通常用来识别 实体的某属性,如顾客的折扣等级或车辆的购买日期。 |