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(1) The simplest method of modification is to modify the character set key values in the MySQL My.ini file,
such as Default-character-set = UTF8
Character_set_server = UTF8
After the modification, restart the MySQL services, service MySQL restart
Use mysql> show VARIABLES like ' character% '; view, discover that database encoding has been changed to UTF8
(2) Another way to modify the MySQL default character set is to use the MySQL command:
set character_set_client = UTF8 ; 
set character_set_connection = UTF8 ;
Set character_set_database = UTF8 ;
set character_set_results= UTF8 ;
set character_set_server = utf8 ;
set character_set_connection = UTF8 ;
generally even if the MySQL default character set for the table is UTF8 and the UT F-8 encoding to send the query, you will find that the database is still garbled. The problem is on the connection connection layer. The workaround is to execute the query before sending it:
set names ' UTF8 ';
it corresponds to the following three-sentence instruction:
SET character_set_client = UTF8;
SET character_set_connection = UTF8;
SET character_set_results= UTF8;
Ways to modify the MySQL default character set