| 释义 |
alternate key
备用［辅助］关键字
In systems with VSAM,one or more consecutive characters other than the prime key,taken from each data record of a base cluster and used to build an alternate index for that base cluster.
在使用虚拟存储存取方法(VSAM)的系统中,除了主键之外的一个或多个连续字符,取自基 簇中的每个数据记录之中,并用它来为该基簇构造备用索引。 |