prime key meaning in English

主关键字
主键

In vsam , a collection of items used to sequence and locate one or more data records in a base cluster . each alternate index record contains an alternate key value and one or more pointers . when the alternate index supports a key sequenced data set , each data record ' s prime key value is the pointer . when the alternate index supports an entry sequenced data set , the data record ' s rba value is the pointer
在虚拟存储存取方法( vsam )中,用于定序和定位基簇中的一个或多个数据记录的项的汇集.每个备用索引记录包含一个备用关键字的值和一个或多个指针.当该备用索引支持某个关键字顺序数据集时,每个数据记录的主关键字值就是这种指针.当该备用索引支持某个输入顺序数据集时,该数据记录的rba (相对字节地址)值就是这种指针