MySQL:在同一个 MySql 实例上克隆一个 MySQL 数据库
我想编写一个脚本,将我当前的数据库 sitedb1
复制到同一个 mysql 数据库实例上的 sitedb2
.我知道我可以将 sitedb1 转储到 sql 脚本:
mysqldump -u root -p sitedb1 >~/db_name.sql
然后将其导入sitedb2
.有没有更简单的方法,无需将第一个数据库转储到 sql 文件中?
正如手册中所说的 复制数据库 您可以将转储直接通过管道传输到 mysql 客户端:
mysqldump db_name |mysql new_db_name
如果您使用的是 MyISAM,您可以复制文件,但我不建议这样做.有点不靠谱.
整合了各种其他好的答案
mysqldump
和 mysql
命令都接受用于设置连接详细信息(以及更多)的选项,例如:
mysqldump -u <用户名>--password=<原始数据库>|mysql -u <用户名>-p <新数据库>
此外,如果新数据库还不存在,您必须事先创建它(例如使用 echo "create database new_db_name" | mysql -u <dbuser> -p
).>
I would like to write a script which copies my current database sitedb1
to sitedb2
on the same mysql database instance. I know I can dump the sitedb1 to a sql script:
mysqldump -u root -p sitedb1 >~/db_name.sql
and then import it to sitedb2
.
Is there an easier way, without dumping the first database to a sql file?
As the manual says in Copying Databases you can pipe the dump directly into the mysql client:
mysqldump db_name | mysql new_db_name
If you're using MyISAM you could copy the files, but I wouldn't recommend it. It's a bit dodgy.
Integrated from various good other answers
Both mysqldump
and mysql
commands accept options for setting connection details (and much more), like:
mysqldump -u <user name> --password=<pwd> <original db> | mysql -u <user name> -p <new db>
Also, if the new database is not existing yet, you have to create it beforehand (e.g. with echo "create database new_db_name" | mysql -u <dbuser> -p
).
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