它可以运行多达两个双核CPU服务器、多达4 GB的内存、任何存储系统设置，而且无任何数据库大小限制和其他人为限制。

It can be run on up to two dual-core CPU servers, with up to 4 GB of memory, any storage system setup, and no database size restrictions — or any other types of artificial restrictions.

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DB 2 Express - C可以在至多两个双核CPU服务器上运行，服务器上最大内存为4 GB，任何存储系统设置，没有数据库大小或者任何其它人为限制。

DB2 Express-C can be run on up to two dual-core CPU servers, with up to 4 GB of memory, any storage system setup and with no restrictions on database size or any other artificial restrictions.

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阐述了树形结构的数据在数据库中的两种存储方式单编号和双编号法，以及树形数据的排序算法。

Taking SQL Server as the platform, the depth-sorting algorithm for the double identity number tree-like data, realized by recursion, is explained in detail.

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