Modifying the MySQL default character set

(1) The simplest way to modify is to modify the MySQL My.ini file character Set key value, Ubuntu under the MySQL configuration file is under the /etc/mysql/my.cnf ,

I'm going to copy this file to my /home/username folder and rename it to. my.cnf so that even if the configuration goes wrong, it won't affect the database's normal operation

Such as:

[Client]

Default-character-set = UTF8

[Mysqld]
Character_set_server = UTF8

After the modification, restart the MySQL service,

　　sudo restart MySQL

Use mysql> SHOW VARIABLES like ' character% ';

found that the database code has been changed to UTF8

(2) Another way to modify the MySQL default character set is to use the MySQL command

2. MySQL> SET character_set_client = UTF8;
4. MySQL> SET character_set_connection = UTF8;
6. MySQL> SET character_set_database = UTF8;
8. MySQL> SET character_set_results = UTF8;
10. MySQL> SET character_set_server = UTF8;
14. MySQL> SET collation_connection = UTF8;
16. MySQL> SET collation_database = UTF8;
18. MySQL> SET collation_server = utf8;

In general, even if you set the table MySQL default character set is UTF8 and send the query through UTF-8 encoding, you will find that the database is still garbled. The problem is on the connection connection layer. The workaround is to execute the following sentence before sending the query:

1. SET NAMES ' UTF8 ';

It is equivalent to the following three-sentence instruction:

1. SET character_set_client = UTF8;
2. SET character_set_results = UTF8;
3. SET character_set_connection = UTF8;

Modifying the MySQL default character set