修改数据库字符集：
ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE ...]; |
把表默认的字符集和所有字符列（CHAR,VARCHAR,TEXT）改为新的字符集：
ALTER TABLE tbl_name CONVERT TO CHARACTER SET character_name [COLLATE ...]如：ALTER TABLE logtest CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; |
只是修改表的默认字符集：
ALTER TABLE tbl_name DEFAULT CHARACTER SET character_name [COLLATE...]; 如：ALTER TABLE logtest DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; |
修改字段的字符集：
ALTER TABLE tbl_name CHANGE c_name c_name CHARACTER SET character_name [COLLATE ...]; 如：ALTER TABLE logtest CHANGE title title VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci; |
查看数据库编码：
SHOW CREATE DATABASE db_name; |
查看表编码：
SHOW CREATE TABLE tbl_name; |
查看字段编码：
SHOW FULL COLUMNS FROM tbl_name; |