sql，CREATE DATABASE mydatabase CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;，``sql，CREATE DATABASE mydatabase CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;，``sql，ALTER USER 'username'@'host' IDENTIFIED BY 'newpassword';，``SHOW DATABASES;。若要查询某个特定数据库中的所有表名，可以使用：SHOW TABLES FROM database_name;。请替换database_name为实际的数据库名。AUTO_INCREMENT属性来实现主键值自动加一。在创建表时指定主键列为AUTO_INCREMENT，每次插入新记录时，该列的值会自动递增。hostname.err文件中，或者可以通过SQL命令SHOW ENGINE INNODB STATUS;查看InnoDB引擎的状态和最近的事务信息。sql，SELECT table_schema AS 'Database', ， table_name AS 'Table', ， round(((data_length + index_length) / 1024 / 1024), 2) AS 'Size (MB)' ，FROM information_schema.TABLES ，ORDER BY (data_length + index_length) DESC;，``Powered By Z-BlogPHP 1.7.3