keyset

简明释义

英[ˈkiːset]美[ˈkiːset]

n. 键盘

英英释义

单词用法

同义词

反义词

例句

1.A kernel keyset is a representation of a collection of kernel keys and the desired read or write access to them.

内核键集是内核键集合，以及对它们进行读写所需的权限的表示形式。

2.A kernel keyset is a representation of a collection of kernel keys and the desired read or write access to them.

内核键集是内核键集合，以及对它们进行读写所需的权限的表示形式。

3.However, a Level 1 driver can support dynasets if it supports extended fetch and keyset-driven cursors.

但是只要1级驱动程序支持扩展的获取和键集驱动游标，它就可以支持动态集。

4.Allows you to augment the callers keyset with your own.

允许您使用自己的键集来扩充调用者的键集。

5.The keyset in this database allows us to retrieve unique records efficiently.

这个数据库中的键集使我们能够高效地检索唯一记录。

6.You can create a keyset for the configuration settings of your application.

您可以为应用程序的配置设置创建一个键集。

7.In Java, the keyset method returns a set view of the keys contained in the map.

在Java中，keyset方法返回映射中包含的键的集合视图。

8.We need to update the keyset to include the new entries from the user.

我们需要更新键集以包含用户的新条目。

9.The keyset must be synchronized with the data source to ensure consistency.

为了确保一致性，键集必须与数据源同步。

作文

In the world of computer science and programming, certain terms become crucial for understanding concepts and functionalities. One such term is keyset, which refers to a set of keys used in various applications, particularly in databases and data structures. Understanding the concept of keyset can greatly enhance a programmer's ability to work with data efficiently. In this essay, I will explore the definition, applications, and significance of keyset in programming and database management. To begin with, a keyset is essentially a collection of unique identifiers that are used to access data within a data structure, such as a database table or a hash map. Each key in the keyset corresponds to a specific value, allowing for efficient retrieval and manipulation of data. For instance, in a relational database, a keyset might consist of primary keys that uniquely identify each record in a table. This uniqueness is vital, as it ensures that every piece of data can be accessed without confusion or overlap. The applications of keyset are vast and varied. In database management systems (DBMS), a keyset is crucial for maintaining the integrity and efficiency of data operations. When a programmer writes queries to retrieve or manipulate data, they often rely on the keyset to specify which records they are interested in. For example, when using SQL, a common query might involve selecting records based on their primary keys, which are part of the keyset. This allows for quick lookups and ensures that operations are performed on the correct data. Moreover, keyset is not limited to databases alone. In data structures like hash tables, the keyset consists of keys that map to values. This mapping facilitates fast data retrieval, as the hash function computes an index based on the key, allowing for constant time complexity in average cases. Understanding how to effectively utilize a keyset in such structures can lead to optimized algorithms and improved performance in applications. The significance of keyset extends beyond mere data retrieval. It plays a critical role in ensuring data integrity and consistency. By enforcing unique constraints on keys within a keyset, developers can prevent duplicate entries and maintain accurate datasets. This is particularly important in applications where data accuracy is paramount, such as financial systems, healthcare databases, and customer relationship management (CRM) tools. Furthermore, as technology evolves, the concept of keyset is also adapting. With the rise of NoSQL databases, the traditional notion of a keyset is being redefined. In document-based databases like MongoDB, for instance, documents are identified by unique keys that serve a similar purpose to a keyset in relational databases. Understanding these nuances allows developers to choose the right database solutions based on their specific needs and requirements. In conclusion, the term keyset encapsulates a fundamental aspect of data management and programming. Its role in facilitating data retrieval, ensuring integrity, and adapting to new technologies makes it an essential concept for anyone involved in computer science. By mastering the use of keyset, programmers can enhance their ability to create efficient, robust, and reliable applications. As we continue to navigate the complexities of data in our digital age, the importance of understanding and utilizing keyset will only grow, making it a key component in the toolkit of modern developers.

在计算机科学和编程的世界里，某些术语对于理解概念和功能至关重要。其中一个术语是keyset，它指的是用于各种应用程序中的一组键，特别是在数据库和数据结构中。理解keyset的概念可以极大地增强程序员高效处理数据的能力。在这篇文章中，我将探讨keyset在编程和数据库管理中的定义、应用和重要性。 首先，keyset本质上是一个唯一标识符的集合，用于访问数据结构中的数据，例如数据库表或哈希映射。每个keyset中的键对应于特定的值，从而允许高效的数据检索和操作。例如，在关系数据库中，keyset可能由主键组成，这些主键唯一标识表中的每条记录。这种唯一性至关重要，因为它确保每个数据片段都可以无混淆地访问。 keyset的应用范围广泛多样。在数据库管理系统（DBMS）中，keyset对于维护数据操作的完整性和效率至关重要。当程序员编写查询以检索或操作数据时，他们通常依赖于keyset来指定他们感兴趣的记录。例如，在使用SQL时，一个常见的查询可能涉及根据其主键选择记录，而这些主键是keyset的一部分。这使得快速查找成为可能，并确保在正确的数据上执行操作。 此外，keyset并不限于数据库。在像哈希表这样的数据结构中，keyset由映射到值的键组成。这种映射促进了快速数据检索，因为哈希函数基于键计算索引，从而在平均情况下实现常数时间复杂度。理解如何有效利用此类结构中的keyset可以导致优化算法和改进应用程序性能。 keyset的重要性不仅仅体现在数据检索上。它在确保数据完整性和一致性方面也发挥着关键作用。通过对keyset中的键施加唯一约束，开发人员可以防止重复条目并维护准确的数据集。这在数据准确性至关重要的应用程序中尤其重要，例如金融系统、医疗保健数据库和客户关系管理（CRM）工具。 此外，随着技术的发展，keyset的概念也在不断适应。随着NoSQL数据库的兴起，传统的keyset概念正在被重新定义。例如，在基于文档的数据库MongoDB中，文档通过唯一键进行标识，这与关系数据库中的keyset具有类似的目的。理解这些细微差别可以使开发人员根据特定需求和要求选择合适的数据库解决方案。 总之，术语keyset概括了数据管理和编程的基本方面。它在促进数据检索、确保完整性以及适应新技术方面的作用，使其成为任何参与计算机科学的人的基本概念。通过掌握keyset的使用，程序员可以增强创建高效、稳健和可靠应用程序的能力。随着我们继续在数字时代导航数据的复杂性，理解和利用keyset的重要性只会增加，使其成为现代开发人员工具箱中的关键组成部分。