With the help of data warehouses, companies can consolidate information into a single database. This allows business analysts to execute high-speed queries.
Here’s how it works from the technical side of view:
Step 1: Data extraction
The collection of data from multiple disparate sources into so-called intermediate databases.
Step 2: Data conversion
The transfer from the mediate database to the integration layer for aggregation and transformation into an operational data store (ODS).
Step 3: Data uploading
The transfer of data to the data warehouse.
Step 4: Scheme definition
The determination of a suitable scheme to be used for SQL queries.