UC知道求一篇关于SQL的英文翻译！在线等
来源：百度知道 编辑：UC知道 时间：2024/05/09 18:03:41
What is persistence
What is persistence?
Almost all applications require persistent data. Persistence is one of the fundamental concepts in application development. If an information system didn’t preserve data entered by users when the host machine was powered off, the system would be of little practical use. When we talk about persistence in Java, we’re normally talking about storing data in a relational database using SQL. We start by taking a brief look at the technology and how we use it with Java. Armed with that information, we then continue our discussion of persistence and how it’s implemented in object-oriented applications.
1. Relational databases
You, like most other developers, have probably worked with a relational database. In fact, most of us use a relational database every day. Relational technology is a known quantity. This alone is sufficient reason for many organizations to choose it. But to say only this is to pay less respect than is due. Re
What is persistence?
Almost all applications require persistent data. Persistence is one of the fundamental concepts in application development. If an information system didn’t preserve data entered by users when the host machine was powered off, the system would be of little practical use. When we talk about persistence in Java, we’re normally talking about storing data in a relational database using SQL. We start by taking a brief look at the technology and how we use it with Java. Armed with that information, we then continue our discussion of persistence and how it’s implemented in object-oriented applications.
1. Relational databases
You, like most other developers, have probably worked with a relational database. In fact, most of us use a relational database every day. Relational technology is a known quantity. This alone is sufficient reason for many organizations to choose it. But to say only this is to pay less respect than is due. Re
什么是坚持什么是毅力? 几乎所有的应用需要持久数据. 毅力是一个基本概念,应用技术开发. 如果信息系统没有保存数据进入用户时,主机马力为过, 该系统将不会有太大的实用价值. 当我们谈论毅力Java中,我们通常所说的数据存储在关系数据库中使用SQL . 我们首先采取一个简单看看技术和如何使用它与Java . 手持资料,然后我们继续讨论我们的执着和如何它的实施,面向应用. 1 . 关联数据库,你最喜欢其他开发商,有可能是同一个关系数据库. 事实上,我们大多数人使用了关系数据库每一天. 关联技术是一种已知数量。 这单独是许多组织的充足的原因选择它。 但如果说这仅是少付一点尊重,是不是适当时机. 关系数据库是如此的根深蒂固,并非偶然,而是因为他们令人难以置信灵活,稳健的数据管理。一个关系数据库管理系统,不具体到Java ,并建立相关数据库,是不属于某个特定的应用.。相关技术提供了一种共享数据在不同的应用或不同技术的一部分的 同一应用程序(交易引擎和报表引擎,例如) 。关联技术的一个共同点是对许多不同的系统和技术平台。因此,关系数据模型往往是共同的事业--广泛代表性的商业实体。 关系型数据库管理系统,基于SQL的应用程序编程接口; 因此,我们呼吁今天的关系型数据库产品SQL Server数据库管理系统,或当我们谈论特定系统 SQL资料库。