prime record key 中文意思是什麼
prime record key
解釋
主記錄鍵-
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
在虛擬存儲存取方法( vsam )中,用於定序和定位基簇中的一個或多個數據記錄的項的匯集.每個備用索引記錄包含一個備用關鍵字的值和一個或多個指針.當該備用索引支持某個關鍵字順序數據集時,每個數據記錄的主關鍵字值就是這種指針.當該備用索引支持某個輸入順序數據集時,該數據記錄的rba (相對位元組地址)值就是這種指針
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