Relational Model表示（）。

[单选题]The relational database model requires the data be(71)through programs that don't rely on the position of the data in the database. This is in direct(72)to the other database mode, where the program has to follow a series of pointers to the data it

[单选题]Data Model表示（）A . 数据模型B . 文件C . 因特网D . 记录

[单选题]SQL Server is a RDBMS(Relational Database Management System)made by Microsoft.This means that the data is stored in two dimensional (74) .(74) A．documentsB．databasesC．filesD．tables

[单选题]Arelation(from the relational database model)consistsof(由⋯⋯组成)a set of tuples(元组),whichimplies(意味着)that().A．all tuples in a relation must be distinct(独一无二的)B．every relation has a key(键)C．all of the aboveD．for any two tuples,the values associated with

[单选题]SQL Server is a RDBMS(Relational Database Management System)made by Microsoft. This means that the data is stored in two dimensional(70)。A．documentsB．databasesC．filesD．tables

[单选题]( ) is a query language for manipulating data in a relational database.A.As

[名词解释] 模型（Model）

[单选题]The spiral model is a software development model combining elements of both

[单选题]Is a programming model and an associated implementation for processing and generating big data sets with a parallel, distributed algorithm on a cluster.The model is a specialization of the split-apply-combine strategy for data analysis().A．HDFSB．Chuk

[单选题]The OS！( ) model， sometimes also called ISO or 7 layers reference model for