Exporting data using mysqldump

Use mysqldump Derived data

How to modify mysql Database name

The database name needs to be old_db I want to change my name to new_db

• MySQL It is troublesome to modify the database name , Direct modification is not supported , You need to modify the database name indirectly through other ways .
• stay MySQL 5.1.23 In previous versions , We can use RENAME DATABASE To rename the database , But later versions , Because of safety considerations , Delete this command .

Export data first , Reimport data

When the database volume is small , The fastest way is to use mysqldump Command to create a rollover copy of the entire database , And then create a new database , Then import the copy into the new database .

Create the database first

create database new_db;

Use mysqldump Derived data

mysqldump -uroot -p123456 --set-gtid-purged=OFF old_db > /tmp/old_db.sql

Only for ordinary local backup and recovery , You can add --set-gtid-purged=OFF Parameters , The function is not to appear during backup GTID Information .

Import data into a new library

mysql -uroot -p123456 new_db < /tmp/old_db.sql

Use mysqldump Export and import data

Export the entire data

mysqldump -u  user name  -p  Database name  >  Exported file name 
mysqldump -u dbuser -p dbname > dbname.sql

Export a table

mysqldump -u  user name  -p  Database name   Table name >  Exported file name 
mysqldump -u dbuser -p dbname users> dbname_users.sql

Export a database structure

mysqldump -u dbuser -p -d --add-drop-table dbname >d:/dbname_db.sql

-d No data --add-drop-table At every create Add a... Before the statement drop table.

Import database

Commonly used source Order to enter mysql Database console , Such as

> mysql -uroot -proot
> use  database 

And then use source command , The following parameters are script files ( As used here .sql),source d:/dbname.sql.

stay docker In the operation

use root The user enters the container ：

docker exec -it -u root containerId bash

Use the above... After entering the container mysql Relevant instructions can be operated .

Export from container to local computer

sudo docker cp feb39d3faffb:/etc/bash.bashrc  ~/Downloads

Or vice versa

sudo docker cp /tmp/index.html feb39d3faffb:/etc/

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