mysql修改表、字段、库的字符集

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 …];

• ALTER DATABASE apolloConfigdb DEFAULT CHARACTER SET  utf8mb4 COLLATE utf8mb4_unicode_ci;

• 把表默认的字符集和全部字符列（CHAR,VARCHAR,TEXT）改成新的字符集：
  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;

来源:http://www.diannaowa.com/index.php/archives/233