本章通过演示如何使用mysql客户程序创造和使用一个简单的数据库,提供一个MySQL的 入门教程。mysql(有时称为“终端监视器”或只是“监视”)是一个交互式程序,允许你连接 一个MySQL服务器,运行查询并察看结果。mysql可以用于批模式:你预先把查询放在一个文件 中,然后告诉mysql执行文件的内容。使用mysql的两个方法都在这里涉及。
为了看清由mysql提供的一个选择项目表了,用--help选项调用它:
shell> mysql --help
本章假定mysql已经被安装在你的机器上,并且有一个MySQL服务器你可以连接。如果这不是真的, 联络你的MySQL管理员。(如果你是管理员,你将需要请教这本手册的其他章节。)
本章描述建立和使用一个数据库的全过程。如果你仅仅对存取一个已经存在数据库感兴趣, 你可能想要跳过描述怎样创建数据库及它所包含的表的章节。
既然本章本质上是一个教程,许多细节有必要被省略。对于这里所涉及的话题的更多信息, 咨询本手册的相关章节。
8.1 连接与断开服务者
为了连接服务器,当你调用mysql时,你通常将需要提供一个MySQL用户名和很可能,一个口令。 如果服务器运行在不是你登录的一台机器上,你也将需要指定主机名。联系你的管理员以找出 你应该使用什么连接参数进行连接(即,那个主机,用户名字和使用的口令)。一旦你知道正确 的参数,你应该能象这样连接:
shell> mysql -h host -u user -p
Enter password: ********
********代表你的口令;当mysql显示Enter password:提示时输入它。
如果能工作,你应该看见mysql>提示后的一些介绍信息:
shell> mysql -h host -u user -p
Enter password: ********
Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 459 to server version: 3.22.20a-log
Type 'help' for help.
mysql>
提示符告诉你mysql准备为你输入命令。
一些MySQL安装允许用户以“anoymous”(匿名)用户连接在本地主机上运行的服务器。如果在 你的机器是这种情况,你应该能通过没有任何选项地调用mysql与该服务器连接:
shell> mysql
在你成功地连接后,你可以在mysql>提示下打入QUIT随时断开:
mysql> QUIT
Bye
你也可以键入control-D断开

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Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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