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Data warehousingIn addition to designing and implementing HCL OneDB™ dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Dimensional databasesThe HCL OneDB™ Data Warehouse Guide provides information to help you design, implement, and manage dimensional databases, and describes the tools that you can use to create data warehouses and optimize your data warehouse queries.
Design a dimensional data modelTo build a dimensional database, you start by designing a dimensional data model for your business.
Building a dimensional data model
Determine the granularity of the fact tableAfter you gather all the relevant information about the subject area, the next step in the design process is to determine the granularity of the fact table.
Use the business process to determine the granularity
Customer by product by district level granularityBecause the customer buying trends that your organization wants to analyze include a geographical component, you still need to decide the lowest level for the region information.

Customer by product by district level granularity

Because the customer buying trends that your organization wants to analyze include a geographical component, you still need to decide the lowest level for the region information.

The business process indicates that in the past, sales districts were divided by city, but now your organization distinguishes between two regions for the customer base:

Region 1 for California
Region 2 for all other states

Nonetheless, at the lowest level, your organization still includes sales district data. The district represents the lowest level for geographical information and provides a third component to further define the granularity of the fact table.

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