计算机术语“secondary key”的中英文意思、释义、翻译及用法-计算机英汉双解词典

术语	secondary key
释义	secondary key 二级密钥;次键; 辅助(关)键(字) 1. In key management, compare primary key. Synonymous with keyencrypting key. 在密钥管理程序中, 比较 primary key, 同keyencrypting key。 2. In database, a key that does not uniquely define a record. A key that contains the value of an attribute other than the unique identifier. 在数据库中,不能唯一确定一个记录的键值。该键值包含了除唯一性外的属性。 3. A key used to make a unique identification of a record where there are two or more records with the same primary key. 在两个或更多的记录具有相同的主键时,用于作出唯一识别的键。 4. A portion of the first block of each record in an indexed data set that may be used to find the record in the data set. The secondary key is valid only when so defined in the data set control block (DSCB). 索引数据集中每个记录第一块的一部分,该部分可用来在该数据集中寻找记录。仅当数据集控制块(DSCB)按上述原则定义时,辅助键才是有效的。
随便看	clamping C language class class A fire class B fire class C fire class condition classification classifier classify class of channel class of service class probability clause CLC clean-up clear clear all clear all function clear area clear-back signal clear band clear character clear collision clear confirmation

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