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所在平台: Udemy |
课程主页: https://www.udemy.com/course/sql-practice-test-for-experts/
课程评论：没有评论
课程名称：高级SQL实践测试 概述：SQL是一种特定领域的编程语言，用于管理关系型数据库管理系统中的数据或在关系型数据流管理系统中进行流处理。SQL的发音为S-Q-L或See-Qwell。作为一种数据库语言，SQL用于数据库的创建、删除、行的获取以及行的修改等操作。 SQL代表结构化查询语言（Structured Query Language），旨在管理关系型数据库中的数据。它是基于关系代数和元组关系演算的。MySQL、Oracle、MS Access、Sybase、Informix、PostgreSQL和SQL Server等所有数据库管理系统均使用SQL作为标准数据库语言。 学习SQL的必要性： - 创建新的数据库、表和视图 - 向数据库中插入记录 - 更新数据库中的记录 - 从数据库中删除记录 - 从数据库中检索数据 SQL的功能： 通过SQL，我们可以使用类英语的语句以多种方式查询数据库。用户能够访问关系型数据库管理系统中的数据，描述数据，并根据需要定义和操作数据库中的数据。SQL使用户能够创建和删除数据库和表，创建视图、存储过程和函数，并设置对表、过程和视图的权限。 本课程将帮助学员深入理解SQL的实际应用，提升数据库管理和数据操作的能力。
SQL is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.It is pronounced as S-Q-L or sometime See-Qwell. SQL is a database language, it is used for database creation, deletion, fetching rows, and modifying rows, etc.What is SQLSQL stands for Structured Query Language.It is designed for managing data in a relational database management system (RDBMS).It is pronounced as S-Q-L or sometime See-Qwell.SQL is a database language, it is used for database creation, deletion, fetching rows, and modifying rows, etc.SQL is based on relational algebra and tuple relational calculus.All DBMS like MySQL, Oracle, MS Access, Sybase, Informix, PostgreSQL, and SQL Server use SQL as standard database language.Why SQL is requiredSQL is required:To create new databases, tables and viewsTo insert records in a databaseTo update records in a databaseTo delete records from a databaseTo retrieve data from a databaseWhat SQL doesWith SQL, we can query our database in several ways, using English-like statements.With SQL, a user can access data from a relational database management system.It allows the user to describe the data.It allows the user to define the data in the database and manipulate it when needed.It allows the user to create and drop database and table.It allows the user to create a view, stored procedure, function in a database.It allows the user to set permission on tables, procedures, and views.
