Mysql逻辑备份_MySQL
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Mysql逻辑备份
mysqldump的语法如下：
mysqldump [arguments] > file_name
如果想要备份所有的数据库，可以使用--all-databases选项：
mysqldump --all-databases > dump.sql
如果想要备份指定的数据库，可以使用--databases选项：
mysqldump --databases db1 db2 db3 > dump.sql
如果想要对test这个架构进行备份，可以使用如下语句:
mysqldump --single-transaction test > test_backup.sql
使用--single-transaction选项来保证备份的一致性。
--single-trasaction:在备份开始前，先执行START TRANSACTION命令，以此来获得备份的一致性，当前该参数只对InnoDB存储引擎有效。当启用该参数并进行备份时，确保没有其他任何的DDL语句执行，因为一致性并不能隔离DDL语句。
--add-drop-database:在CREATE DATABASE前先进行DROP DATABASE.这个参数需要和-all-databases或者-databases选项一起使用。默认情况下，导出的文本文件中并不会有CREATE DATABASE,除非你指定了这个参数。
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