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Some database applications do not present database information directly to the user. Instead, they analyze and summarize information from databases so that users can draw conclusions from the data.
The TDBChart component on the Data Controls category of the Tool Palette lets you present database information in a graphical format that enables users to quickly grasp the import of database information.
In addition, some versions of Delphi include a Decision Cube category on the Tool Palette. It contains six components that let you perform data analysis and cross-tabulations on data when building decision support applications.
If you want to build your own components that display data summaries based on various grouping criteria, you can use maintained aggregates with a client dataset.