主关键字 meaning in English
major key
majority key
primary key
prime key word
Examples
- Internal id and primary key for a row
内部id和一行的主关键字。 - The reason is that the results are unpredictable unless you always group by a primary or candidate key value because you cannot know which value from the non - grouped data will be selected
这个原因是因为结果是不可预知的，除非你允许以主关键字或是候选关键字来作为分组，因为你无法知道which将从哪能一个非分组的数据作选取。 - All of these dtos are declared externalizable to speed up the marshaling time , and i even created some custom finders to make it easier to access the cmps without creating primary key objects all the time
所有的这些dto都声明为可外部化，以此来加快编组速度，我甚至创建了一些定制的定位器，这样就可以在不必创建主关键字对象的情况下，更方便地访问cmp 。 - Thus using gis technique to manage the debris flow hazard ' s spatial data would be a suitable method . based on the wholly design of the debris flow hazard database , this thesis begins with setting up the debris flow hazard graph database with mapgis tool . following the work flows , i . e . vectorization , graphic edit , error adjustment and map collection
探讨了在mapgis中如何快捷有效地建立泥石流灾害图形数据库，即按照矢量化、图形编辑、误差校正、图幅拼接等流程进行；选用microsoftaccess建立泥石流灾害属性数据库；通过在图形数据库和属性数据库中设立主关键字来实现图形数据和属性数据的无缝连接。 - 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