MySQL
SQL

MySQL | Use non-alphanumeric characters and underscores in backquotes when using anything other than underscores in database names / table names


I can not create a database

For example, I want to create a database with a hyphenated name. But even if it writes like this.

 mysql> CREATE DATABASE example; 

It is useless.

 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-xample' at line 1 

MySQL does not give me any kind of errors.


Alphanumeric characters and underscores

When using characters other than "alphanumeric characters" and "under bar" , enclose them with back quotes.

 mysql> CREATE DATABASE `example`; 

Query OK, 1 row affected (0.01 sec)

Other. It will work well if you enclose it in a back quote.

 CREATE DATABASE `example`; CREATE DATABASE `e/x/a/m/p/l/e`; CREATE DATABASE `e*x*a*m*p*l*e`; CREATE DATABASE `えぐざんぷる`; 


exception

If there is a space at the beginning or end, it is considered an invalid name. It was impossible even if it enclosed with a back quote.

 CREATE DATABASE ` example `; 

ERROR 1102 (42000): Incorrect database name ' example '


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MySQL | 英数字以外とアンダーバー 以外をデータベース名 / テーブル名に使う時はバッククォートで囲う


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