The different data for the intelligence information system are stored intermediately in a place called data warehouse.
The data warehouse is therefore the only place where all enterprise data are consolidated. The creator of the Data Warehouse concept, Bill Inmon, defines it as follows:
"A data warehouse is a collection of thematic, integrated, non-volatile and historized data for decision-making."Its main characteristics are therefore as follows:
The term Datamart refers to a subentity of data warehouses containing the data of the data warehouse for a particular sector of the company (department, division, service, product line, etc.). For example, there is a DataMart Marketing, DataMart Commercial, etc.