mysql修改字符集筆記

修改數據庫字符集：

ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE ...];

把表默認的字符集和所有字符列（CHAR,VARCHAR,TEXT）改爲新的字符集：

ALTER TABLE tbl_name CONVERT TO CHARACTER SET character_name [COLLATE ...]
如：ALTER TABLE logtest CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

只是修改表的默認字符集：

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;

查看數據庫編碼：

SHOW CREATE DATABASE db_name;

查看錶編碼：

SHOW CREATE TABLE tbl_name;

查看字段編碼：

SHOW FULL COLUMNS FROM tbl_name;

一次性修改表中所有字段的字符集語句：

alter table tbl_name convert to character set utf8;