MySQL character set

View database character set ：

SHOW VARIABLES LIKE 'character%';

use SQL Statement modify character set ：
Modify the character set of the database ：

alter DATABASE test DEFAULT CHARACTER SET = utf8; // test Name the database 

Modify the character set of the database table ：

ALTER TABLE test.bd_user DEFAULT CHARACTER SET = utf8; // bd_user Is the name of the watch 

Modify the character set of a field in the database ：

ALTER TABLE erp20220419.scm_supplier_goods MODIFY COLUMN unit VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci; //  The field type will also be changed here