391/531 是为服务器端设计的数据库，能承受高并发访问，同时占用的内存也远 远大于 SQLite。 此外，MySQL 内部有多种数据库引擎，最常用的引擎是支持数据库事 务的 InnoDB。 安装 MySQL 可以直接从 MySQL 官方网站下载最新的 Community Server 5.6.x 版本。 MySQL 是跨平台的，选择对应的平台下载安装文件，安装即可。 /etc/mysql/my.cnf： [client] default-character-set = utf8 [mysqld] default-storage-engine = INNODB character-set-server = utf8 collation-server = utf8_general_ci 重启 MySQL 后，可以通过 MySQL 的客户端命令行检查编码： `idx_email` (`email`), key `idx_created_at` (`created_at`), primary key (`id`) ) engine=innodb default charset=utf8; create table blogs ( `id` varchar(50) not null, `user_id` varchar(50)

information about InnoDBs transaction model see MySQL - The InnoDB Transaction Model and Locking [http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction- model.html] in the MySQL user manual. (Thanks

READ-COMMITTED For more information about InnoDB`s transaction model see MySQL - The InnoDB Transaction Model and Locking [http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction- model.html] in the MySQL

information about InnoDBs transaction model see MySQL - The InnoDB Transaction Model and Locking [http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction- model.html] in the MySQL user manual. (Thanks

READ-COMMITTED For more information about InnoDB`s transaction model see MySQL - The InnoDB Transaction Model and Locking [http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction- model.html] in the MySQL

Savepoints are available with the SQLite (≥ 3.6.8), PostgreSQL, Oracle and MySQL (when using the InnoDB storage engine) backends. Other backends provide the savepoint functions, but they’re empty operations on your MySQL version and the table types you’re using. (By “table types,” we mean something like “InnoDB” or “MyISAM”.) MySQL transaction peculiarities are outside the scope of this article, but the MySQL to easily evaluate the validity of a primary key. If you’re using Postgres, Oracle, or MySQL with InnoDB, this is enforced at the database integrity level – database level key constraints prevent the creation

Savepoints are available with the SQLite (≥ 3.6.8), PostgreSQL, Oracle and MySQL (when using the InnoDB storage engine) backends. Other backends provide the savepoint functions, but they’re empty operations on your MySQL version and the table types you’re using. (By “table types,” we mean something like “InnoDB” or “MyISAM”.) MySQL transaction peculiarities are outside the scope of this article, but the MySQL to easily evaluate the validity of a primary key. If you’re using Postgres, Oracle, or MySQL with InnoDB, this is enforced at the database integrity level – database level key constraints prevent the creation

Savepoints are available with the SQLite (≥ 3.6.8), PostgreSQL, Oracle and MySQL (when using the InnoDB storage engine) backends. Other backends provide the savepoint functions, but they’re empty operations on your MySQL version and the table types you’re using. (By “table types,” we mean something like “InnoDB” or “MyISAM”.) MySQL transaction peculiarities are outside the scope of this article, but the MySQL to easily evaluate the validity of a primary key. If you’re using Postgres, Oracle, or MySQL with InnoDB, this is enforced at the database integrity level – database level key constraints prevent the creation

Savepoints are available with the SQLite (≥ 3.6.8), PostgreSQL, Oracle and MySQL (when using the InnoDB storage engine) backends. Other backends provide the savepoint functions, but they’re empty operations on your MySQL version and the table types you’re using. (By “table types,” we mean something like “InnoDB” or “MyISAM”.) MySQL transaction peculiarities are outside the scope of this article, but the MySQL to easily evaluate the validity of a primary key. If you’re using Postgres, Oracle, or MySQL with InnoDB, this is enforced at the database integrity level – database level key constraints prevent the creation

Savepoints are available with the SQLite (≥ 3.6.8), PostgreSQL, Oracle and MySQL (when using the InnoDB storage engine) backends. Other backends provide the savepoint functions, but they’re empty operations on your MySQL version and the table types you’re using. (By “table types,” we mean something like “InnoDB” or “MyISAM”.) MySQL transaction peculiarities are outside the scope of this article, but the MySQL Documentation, Release 2.0.14.dev20190701080343 If you’re using Postgres, Oracle, or MySQL with InnoDB, this is enforced at the database integrity level – database level key constraints prevent the creation