![]() Here’s an example where you specify the character set and collation. If you run this and the database does not exist, the database will be created. If you run this and the database already exists, you’ll get a warning: 1 row(s) affected, 1 warning(s): 1007 Can't create database 'new_shop' database exists This command will create a database if one does not exist. This will create a new database called new_shop on your MySQL server. You can run this on the command line, or within an IDE such as MySQL Workbench CREATE DATABASE new_shop ![]() Here’s a simple example of a Create Database command. Let’s see an example of creating a new database So you can also run the Create Schema command: CREATE SCHEMA database_name Note: in MySQL, a schema is the same as a database. It can be set to Y to enable it or N to disable it. In MySQL 8.0, The default collation is utf8mb4_0900_ai_ci, but you can also change this for the database, table, or column.ĮNCRYPTION: This allows you to specify the default database encryption, which is used by all tables in the database. You can also specify the character set at the table or column level.ĬOLLATE: This lets you specify the collation for the database, which are the rules that define how to compare and sort characters. In MySQL 8.0, the default character set is utf8mb4, but you can change it to another one here. A character set is a set of characters that can be used in strings in a database. Can't create database 'demo' database existsĬHARACTER SET: This lets you specify the character set for the new database. Without these keywords, if you run the CREATE DATABASE command and the database exists, you’ll get an error message: Error Code: 1007. IF NOT EXISTS: Add these keywords to your CREATE DATABASE statement, and the database will be created if it does not exist, and it won’t be created if it already exists. The full command has a lot more options you can set: CREATE DATABASE database_name The simple version looks like this: CREATE DATABASE database_name Thanks Aaron.To create a new database in MySQL, you can use the CREATE DATABASE command. ibd files does not buy you anything except for spread-out files. If the same display comes up, you did it was kind enough to remind me that spreading. Mysql -uroot select table_schema,table_name from information_schema.tables Next, move the tables into the symlinked databases mysql -uroot -AN -e"SELECT CONCAT('ALTER TABLE ',db,'.',tb,' RENAME ',SUBSTR(db,4),'.',tb,' ') FROM information_schema.tables WHERE table_schema in ('tmpdb1','tmpdb2','tmpdb3')" > /root/MoveTables2.sql Go into mysql and make sure the databases are visible mysql> show databases Ln -s /home/user3/mysql /opt/mysql/data/db3 Ln -s /home/user2/mysql /opt/mysql/data/db2 Go into the OS and create symlinks ln -s /home/user2/mysql /opt/mysql/data/db1 Next, drop the original databases mysql> drop database db1 Next, let's move every table you have db1 to tmpdb1, db2 to tmpdb2, db3 to tmpdb3 mysql -uroot -AN -e"SELECT CONCAT('ALTER TABLE ',db,'.',tb,' RENAME tmp',db,'.',tb,' ') FROM information_schema.tables WHERE table_schema in ('db1','db2','db3')" > /root/MoveTables1.sql Let's start by creating temp databases mysql> create database tmpdb1 If you have three databases (db1, db2, db3), then the folders are:īefore doing anything run this query: mysql> select table_schema,table_name from information_schema.tables Each database woudl reside under that folder. WARNING : The following only works with innodb_file_per_table enabledįor example, suppose your datadir was /opt/mysql/data.
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