mysql修改表,字段,库的字符集

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;

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