根据上文“What is a database? A database is a collection of data or information that is organized, stored, and accessed electronically.(什么是数据库?数据库是用电子方式组织、存储和访问的数据或信息的集合)”以及后文“There are three main distinguishing aspects of any database(任何数据库都有三...
informationyou find on the internet and that in databases is that the information found in databases is often confirmed." (你在互联网上找到的信息和在数据库中找到的信息之间的一个主要区别是,在数据库中找到的信息通常是经过证实的。)可知,本段在讲数据库的可靠性。A项"它是可靠的"可以作为本段主旨句...
Akey-value databaseis a type of non-relational database, also known asNoSQL database, that uses a simple key-value method to store data. It stores data as a collection of key-value pairs in which a key serves as a unique identifier. Both keys and values can be anything, ranging from...
Database A database is where data is organized, stored, and managed by data structure. Databases have been used in computers since the 1960s, with the two prevailing data models (hierarchical and network), and data and applications were very interdependent. This limited database applications. ...
A database primary key is a column or combination of columns which uniquely identifies each row in a table. As long as you have unique primary keys, you also have unique rows, which makes it possible to uniquely identify every row in a table. ...
Choosing the primary key in a database is one of the most important steps in the process. It can be a normalattributethat is guaranteed to be unique such as Social Security number on a table with no more than one record per person or — preferably — it can be generated by the databa...
A cloud database is a database service built and accessed through acloud computingplatform. It serves many of the same functions as a traditional database with the added flexibility of cloud computing. Users install software on a cloud infrastructure to implement the database. ...
Agraph databaseis defined as a specialized, single-purpose platform for creating and manipulating graphs. Graphs contain nodes, edges, and properties, all of which are used to represent and store data in a way that relational databases are not equipped to do. ...
Azure SQL, for instance, is a family of managed SQL database services built on the SQL Server database engine and hosted in the Azure cloud. PostgreSQL. PostgreSQL is an advanced object-relational database management system (ORDBMS) that stores and scales workloads that are too complex to be...
Cloud Database, Defined A cloud database is a database that is built, deployed, and accessed in a cloud environment, such as a private, public, or hybrid cloud. There are two primary clouddatabase deploymentmodels, reviewed below: