If the administrator creates your database for you when setting up your permissions, you can begin using it. 如果管理员在设置权限时为您创建了数据库，您可以开始使用它。Otherwise, you need to create it yourself:否则，您需要自己创建它：

mysql> CREATE DATABASE menagerie;

Under Unix, database names are case-sensitive (unlike SQL keywords), so you must always refer to your database as menagerie, not as Menagerie, MENAGERIE, or some other variant. 在Unix下，数据库名称区分大小写（与SQL关键字不同），因此必须始终将数据库称为menagerie，而不是Menagerie、MENAGERIE或其他变体。This is also true for table names. 表名也是如此。(Under Windows, this restriction does not apply, although you must refer to databases and tables using the same lettercase throughout a given query. （在Windows下，此限制不适用，尽管您必须在整个给定查询中使用相同的字母大小写引用数据库和表。However, for a variety of reasons, the recommended best practice is always to use the same lettercase that was used when the database was created.)但是，由于各种原因，建议的最佳做法是始终使用创建数据库时使用的同一个字母大小写。）

Creating a database does not select it for use; you must do that explicitly. 创建数据库时不会选择要使用的数据库；你必须明确地这样做。To make menagerie the current database, use this statement:要使menagerie成为当前数据库，请使用以下语句：

mysql> USE menagerie
Database changed

Your database needs to be created only once, but you must select it for use each time you begin a mysql session. 您的数据库只需要创建一次，但每次开始mysql会话时都必须选择使用它。You can do this by issuing a USE statement as shown in the example. 您可以通过发出一个USE语句来实现这一点，如示例所示。Alternatively, you can select the database on the command line when you invoke mysql. 或者，您可以在调用mysql时在命令行上选择数据库。Just specify its name after any connection parameters that you might need to provide. 只需在您可能需要提供的任何连接参数之后指定其名称。For example:例如：

shell> mysql -h host -u user -p menagerie
Enter password: ********