摘要：
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 tb 阅读全文
