mysqldump is a command-line tool for backing up and restoring MySQL databases, which provides a wealth of options and features. The following is a detailed explanation of the usage of mysqldump:
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Backup the entire database:
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Run the following command to back up the entire database and save the result to a file:
mysqldump -u <用户名> -p <数据库名> > <输出文件名>.sql - Replace
<用户名>with the user name of the MySQL database,<数据库名>the name of the database to be backed up, and<输出文件名>the file name for saving the backup result. - After executing the command, you will be prompted to enter the password, and the backup will start after entering the password.
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Backup specified table:
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To backup only specified tables, you can use
--tablesoption:mysqldump -u <用户名> -p <数据库名> --tables <表名1> <表名2> ... > <输出文件名>.sql - Will be
<表名1> <表名2> ...replaced with a list of table names to backup.
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Backup structure without data:
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To back up only the database structure and not the data, you can use
--no-datathe option:mysqldump -u <用户名> -p <数据库名> --no-data > <输出文件名>.sql
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Backup data without structure:
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To back up only the database data without the structure, you can use
--no-create-infothe option:mysqldump -u <用户名> -p <数据库名> --no-create-info > <输出文件名>.sql
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Restore the database:
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To restore a database backed up from a backup file, the following command can be used:
mysql -u <用户名> -p <数据库名> < <备份文件名>.sql - Replace
<备份文件名>with the actual backup filename.
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Please note that when executing the mysqldump and mysql commands, <用户名>and <数据库名>are mandatory items, and -pthere is no need for a space after the option. During the backup process, you will be prompted to enter a password, and the backup or recovery will start after entering the password. Hope this information helps you!