您应该创建自己的数据库或使用现有数据库。
You should create your own database, or use an existing one.
现在，将询问您是需要创建新数据库，还是使用现有数据库。
Now, you are asked whether you want to create a new database, or use an existing database.
如果您对现有数据库启用前滚恢复，将主日志的数量更改成当前正在使用的主日志和辅助日志的数量总和，再加1。
If you are enabling an existing database for roll-forward recovery, change the number of primary logs to the sum of the number of primary and secondary logs you are currently using, plus 1.
本文介绍SQLDELETE和UPDATE语句，您可以使用它们有选择地删除或修改ApacheDerby数据库中的现有数据。
This article introduces the SQL DELETE and UPDATE statements, which you can use to selectively delete or modify existing data in an Apache Derby database.
如果想对现有数据库使用迁移，可以用rake schema_dump对现在的模式做个快照。
If you want to start using migrations with an existing database, you can snapshot your existing schema with rake schema_dump.
这样，要修改一个名为test_db的现有数据库，使其使用自动存储，则可以执行如下所示的ALTERDATABASE命令。
Thus, to modify an existing database named TEST_DB so that it USES automatic storage, you would execute an ALTER database command that looks like this.
我还演示了如何使用SpringRoo数据库反向工程特性根据现有数据库创建应用程序。
I also showed how to create an application from an existing database using the Spring Roo database reverse-engineering feature.
本文展示了SQLObject如何与数据库交互，如何使用SQLObject编写数据库访问和数据验证代码，以及如何将它用于遗留或现有数据库。
This article shows you how SQLObject interacts with a database, how to use SQLObject to write database access and data-validation code, and how to use it with legacy or pre-existing databases.
在您创建完数据库或者打开现有数据库时，可以使用以下选项。
When you have created the database or opened an existing one, the following options are available to you.
说明如何使用服务器资源管理器从现有数据库中删除表。
Describes how to use Server Explorer to delete tables from an existing database.
如果现有数据库中存在大量的引用数据，并且希望将这些数据导入您的数据库中，则可以使用此选项。
You might use this option if you have a large amount of reference data in an existing database, and you want to import it into your database.
您可以使用可视化数据库工具的服务器资源管理器窗口连接到现有数据库。
You can connect to an existing database using the Server Explorer window of the Visual database Tools.
您可以使用可视化数据库工具的服务器资源管理器窗口连接到现有数据库。
You can connect to an existing database using the Server Explorer window of the Visual database Tools.
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