单词 |
secondary key |
释义 |
1 ?次关键字 次关键字(Secondary Key): 2.实体间的联系 实体之间的对应关系称为联系,它反映了现实世界事物之间 的相互关联。 2 ?辅助索引 5)辅助索引(Secondary key):辅助索引也是有两个字段的有序文件。第一个字段是索引字段,有相同的数据类型,并且是数据文件中的非排序字段,第二个字段可以... 3 [计]?二级密钥 二级密钥(Secondary Key)用于保护初级密钥,记作KN ,这里N表示节点,源于它在网络中的地位。 4 ?次键 实体类只能有一个主键和恣意数目的次键(secondary key),直接耐久层会主动为每个次键字段树立索引,实体数据也可以按次键索引(secondary index)贮存和读取。
- 1
The secondary key that you supplied is too long or short. - 2
The secondary key can be set to be persistent or temporary. - 3
There is exactly one primary key and at most one secondary key for the wireless Hosted Hetwork on any computer. 在任何计算机中,无线承载网络都有且只有一个主密钥,一个第二密钥。
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