How to rename a database (table name) command in MySQL

Five ways to change MySQL database name:

The code is as follows	Copy Code
1. RENAME DATABASE db_name to New_db_name

This one.. This syntax is added to the MySQL 5.1.7, 5.1.23 and removed.
It is said that it is possible to lose data. It's better not to use it.

It's simple, just a rename. Grammar:

The code is as follows	Copy Code
RENAME DATABASE db_name to New_db_name; # or RENAME SCHEMA db_name to New_db_name;

This time on the side to do the Web page, is also a learning MySQL

2. If all tables are MyISAM type, you can change the name of the folder
Close Mysqld
Rename the Db_name directory in the data directory to New_db_name
Open mysqld

3. Rename all Tables

The code is as follows	Copy Code
CREATE DATABASE New_db_name; RENAME TABLE Db_name.table1 to New_db_name.table1, Db_name.table2 to New_db_name.table2; DROP DATABASE db_name;

4. Mysqldump Export Data and import

The code is as follows	Copy Code
mysqldump-uxxxx-pxxxx-h xxxx db_name > Db_name_dump. Sql Mysql-uxxxx-pxxxx-h xxxx-e "CREATE DATABASE new_db_name" mysql-uxxxx-pxxxx-h xxxx New_db_name < Db_name_dump. Sql Mysql-uxxxx-pxxxx-h xxxx-e "DROP DATABASE db_name"

5. Rename all tables using the shell script

The code is as follows	Copy Code
#!/bin/bash mysqlconn= "Mysql-u xxxx-pxxxx-s/var/lib/mysql/mysql.sock-h localhost" olddb= "Db_name" newdb= "New_db_name" # $mysqlconn-E "CREATE DATABASE $newdb" params=$ ($mysqlconn-N-E "SELECT table_name from INFORMATION_SCHEMA. TABLES WHERE table_schema= ' $olddb ') for name in $params; Todo $mysqlconn-E "RENAME TABLE $olddb. $name to $newdb. $name"; Done # $mysqlconn-E "DROP DATABASE $olddb"

is the optimized version of Method 3.