大多数业务都建立在信息管理系统的基础上，而这些信息管理系统主要的底层基础设施又是基于存储在一个或多个关系数据库中的数据。
Most businesses are built on information management systems whose main underlying infrastructures are based on data stored in one or more relational databases.
农村公路基础数据库的建立和应用，为农村公路的规划、建设、管理和养护提供了强有力的信息支撑。
Establishment and application of fundamental database for rural roads will provide strong information support for planning, construction, management and maintenance of rural roads.
在此基础上，着重阐述了如何建立结点基本信息数据库和约束关系数据库，从而构造出平面连杆机构的数学模型。
On this basis, it emphasized how to establish the node basic information database and the restricting relation database, and constructed out the mathematic model of the planar linkage mechanism.
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