Please see attached file
Explain the key concepts that are involved in summarizing data in a query. Include an explanation of functions and grouping. Please provide some examples to illustrate your points.
The process of taking numerous records and collapsing them into a single summary record is called Data Aggregation. It is very important to decide before hand what records must be considered to be included in the summary and in what pattern should they appear. Data can be summarized on the basis of attributes that already exist in the database, and also those that are derived from the database. Once the data to summarize has been decided on, it is imperative to decide how to aggregate the data. Data can be aggregated in innumerably many ...
The expert summarizes query and explains the functions and grouping. The key concepts that are involved in summarizing data in a query are given.