幸运的是，学习如何查询包含名称空间的XML文档并不难。
Fortunately, it's not hard to learn how to query XML documents that contain namespaces.
学习如何利用数据库管理系统中的xml索引和查询过滤功能来确保强健的运行时性能。
Learn how to leverage XML indexing and query filtering capabilities in a database management system to ensure strong runtime performance.
在下一节中，您将学习如何创建索引来加速查询。
In the next section, you will learn how to create indexes to speed up your queries.
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