网路式资料库模型是建立在两种「集合结构(Set Structures),也就是一组记录型态的记录集合(A Set of Records)和一组连接型态的连接集合(A Set of Links),如下图所示: 3-2-1 网路式资料库模型-网路式资料库
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a boxed set of records 盒装的一套唱片
A relational database comprises a set of tables, containing a set of records or rows.
关系数据库由一组表组成,包含一组记录或行。
The break command can be used to break the report into a set of records based on a particular column value.
BREAK命令可用于基于特定列值将报表分成一组记录。
In Listing 4, we're going to extract a set of records that meet a certain criterion, and print out their values.
在清单4中,我们将抽取出符合特定条件的一套记录,然后打印出它们的值。
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