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bitsCN.com 最近得到了一个数十M的MySQL脚本文件,准备还原为数据库。以前就使用MySQL-Front短暂使用过MySQL,先用它试试,结果挂掉。
这样吧,先用MySQL-Front创建了空数据库,然后使用mysql命令行导入吧。
1)使用MySQL-Front创建了空数据库
因为看脚本中对象都有DEFAULT CHARSET=gbk COMMENT=… 指令,所以字符集选择gbk
2)启动MySQL命令行,输入密码
3)使用新建的数据库b
输入命令: use b;
4)更改文件读取字符集为utf8,这一步很关键
开始时,看到DEFAULT CHARSET=gbk COMMENT=… ,以为要设为gbk,就使用了以下指令:
set names gbk;
但是导入时,全是错误,无法识别中文。
后来认识到应该设置为SQL文件本身的字符集,那SQL文件本身的字符集是什么呢?
我的方法是用VS.net IDE 打开文件,然后另存为,选择“编码保存”
由此看到字符集是utf-8;
所以
输入命令: set names utf8; 注意不是 set names utf-8;
5) 导入文件
输入命令: source 文件路径;
很快,文件成功导入为数据库,效率很高。
到MySQL-Front中看一下,数据正常导入,大功告成!

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.

MySQL is suitable for beginners because: 1) easy to install and configure, 2) rich learning resources, 3) intuitive SQL syntax, 4) powerful tool support. Nevertheless, beginners need to overcome challenges such as database design, query optimization, security management, and data backup.

Yes,SQLisaprogramminglanguagespecializedfordatamanagement.1)It'sdeclarative,focusingonwhattoachieveratherthanhow.2)SQLisessentialforquerying,inserting,updating,anddeletingdatainrelationaldatabases.3)Whileuser-friendly,itrequiresoptimizationtoavoidper

ACID attributes include atomicity, consistency, isolation and durability, and are the cornerstone of database design. 1. Atomicity ensures that the transaction is either completely successful or completely failed. 2. Consistency ensures that the database remains consistent before and after a transaction. 3. Isolation ensures that transactions do not interfere with each other. 4. Persistence ensures that data is permanently saved after transaction submission.

MySQL is not only a database management system (DBMS) but also closely related to programming languages. 1) As a DBMS, MySQL is used to store, organize and retrieve data, and optimizing indexes can improve query performance. 2) Combining SQL with programming languages, embedded in Python, using ORM tools such as SQLAlchemy can simplify operations. 3) Performance optimization includes indexing, querying, caching, library and table division and transaction management.

MySQL uses SQL commands to manage data. 1. Basic commands include SELECT, INSERT, UPDATE and DELETE. 2. Advanced usage involves JOIN, subquery and aggregate functions. 3. Common errors include syntax, logic and performance issues. 4. Optimization tips include using indexes, avoiding SELECT* and using LIMIT.


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