Explain the term retrieval of analytical information in the following data warehouse definition:The data warehouse is a structured repository of integrated, subject-oriented, enterprise-wide, historical, and time-variant data

The purpose of the data warehouse is the retrieval of analytical information. A data warehouse can store detailed and/or summarized data.

A data warehouse is developed for the retrieval of analytical information, and it is not meant for direct data entry by the users. The only functionality available to the users of the data warehouse is retrieval. The data in the data warehouse is not subject to modifications, insertions, or deletions by the end users. New data in the data warehouse is periodically loaded from the operational data sources and appended to the existing data in an automatic fashion. The data that eventually gets older than the required time horizon is automatically purged from the data warehouse (and possibly archived and/or summarized). However, the data in the data warehouse is not subject to changes. That is why the data in the data warehouse is referred to as nonvolatile, static, or read-only.