Suppose you need to query an external customer relationship management (CRM) system to retrieve customer's data. Your invocation of the CRM system might look like this.
假定需要查询一个外部客户关系管理(CRM)系统以获取客户的数据。
In order to implement a temporal database management system, we have to set up a query language for the data model.
为了实现时态数据库管理系统，除了数据模型之外，还需要有一个时态数据库的查询语言。
The system was provided with function of workspace, data and map management, object operation, spatial query and analysis in the environment of GIS.
该系统具有GIS工作空间管理功能、数据管理功能、地图管理功能、对象操作功能、查询及空间分析功能；
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