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

mysql> CREATE DATABASE menagerie;

在 Unix 下，数据库名称是区分大小写的（不像 SQL 关键字），所以你必须始终将数据库称为 menagerie，而不是 Menagerie、MENAGERIE 或其他变体。表名也是如此。（在 Windows 下，这个限制不适用，尽管在给定查询中必须保持数据库和表的字母大小写一致。然而，由于各种原因，推荐的最佳做法是始终使用创建数据库时使用的相同字母大小写。）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. This is also true for table names. (Under Windows, this restriction does not apply, although you must refer to databases and tables using the same lettercase throughout a given query. 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.)

创建数据库不会自动将其选为使用数据库；您必须显式执行此操作。要将 menagerie 设置为当前数据库，请使用以下语句：Creating a database does not select it for use; you must do that explicitly. To make menagerie the current database, use this statement:

mysql> USE menagerie
Database changed

您的数据库只需要创建一次，但每次开始 mysql 会话时，必须选择它以供使用。您可以通过发出如示例所示的 USE 语句来完成此操作。或者，您也可以在调用 mysql 时，在命令行中选择数据库。只需在您可能需要提供的任何连接参数之后指定其名称。例如：Your database needs to be created only once, but you must select it for use each time you begin a mysql session. You can do this by issuing a USE statement as shown in the example. Alternatively, you can select the database on the command line when you invoke mysql. Just specify its name after any connection parameters that you might need to provide. For example:

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