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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