文章总结了关于MYSQL导入导出常用命令,包括各种数据导入导出时出现的问题解决方法,有需要学习的朋友可参考参考。
一、备份数据库:(命令在DOS的mysqlin目录下执行)
代码如下 | 复制代码 |
mysqldump --opt school>school.bbb |
注释:将数据库school备份到school.bbb文件,school.bbb是一个文本文件,文件名任取,打开看看你会有新发现。
1.导出整个数据库
代码如下 | 复制代码 |
mysqldump -u 用户名 -p 数据库名 > 导出的文件名 mysqldump -u root -p aikersql> aiker.sql |
2.导出一个表
代码如下 | 复制代码 |
mysqldump -u 用户名 -p 数据库名 表名> 导出的文件名 mysqldump -u aiker -p aikersql users> aiker_users.sql |
3.导出一个数据库结构
代码如下 | 复制代码 |
mysqldump -u root -p -d --add-drop-table aikersql>d:aiker_db.sql |
-d 没有数据 --add-drop-table 在每个create语句之前增加一个drop table
二.导入数据库
常用source 命令
进入mysql数据库控制台,如mysql -u root -p
代码如下 | 复制代码 |
mysql>use 数据库 |
然后使用source命令,后面参数为脚本文件(如这里用到的.sql)
mysql>source d:aiker_db.sql
也可以用
代码如下 | 复制代码 |
mysql -uroot -Ddb1 |
三、将文本数据转到数据库中
1、文本数据应符合的格式:字段数据之间用tab键隔开,null值用n来代替.
例:
3 rose 深圳二中 1976-10-10
4 mike 深圳一中 1975-12-23
2、数据传入命令 load data local infile "文件名" into table 表名;
注意:你最好将文件复制到mysqlbin目录下,并且要先用use命令打表所在的库。
数据导出
数据导出主要有以下几种方法:
使用select into outfile "filename"语句
使用mysqldump实用程序
使用phpmyadmin导入
例如:mysql> select * from driver into outfile "a.txt";
导入
同导出相类似,导入也有两种方法:
使用LOAD DATA INFILE "filename"命令
使用mysqlimport实用程序
使用phpmyadmin导入
使用sql文件
下面谈一下关于导入文件大小限制问题的解决:
默认情况下:mysql 对导入文件大小有限制的,最大为2M,所以当文件很大时候,直接无法导入,下面就这个问题的解决列举如下:
1.在php.ini中修改相关参数:
影响mysql导入文件大小的参数有三个:
memory_limit=128M,upload_max_filesize=2M,post_max_size=8M
修改upload_max_filesize=200 M 这里修改满足你需要的大小,
可以同时修改其他两项memory_limit=250M post_max_size=200M
这样就可以导入200M以下的.sql文件了。
上文中是把mysql放置在系统路径中,其实不妨也行。例如我的Mysql安装目录为D:MySQL Server 5.0;
则首先用cmd打开dos窗口,然后输入D:(没有'')回车
此时应该会出现D:>这样的标记,然后在其后面输入D:MySQL Server 5.0bin回车(顺序颠倒也行的)
出现D:MySQL Server 5.0bin> 接着输入mysqldump -u用户名 -p 数据库名 > 数据库名.sql(也可以输入路径);具体用法参照上文。
导入文件同样,只是改了‘>’为‘

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

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.


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