Database – RDBMS: There are a number of relational databases to store data. A relational database contains normalized data stored in tables. Tables contain records and columns. RDBMS makes it easy to work with individual records. Each row contains a unique instance of data for the categories defined by the columns. RDBMS are used in…
What is a Data Warehouse? According to Inmon, famous author for several data warehouse books, “A data warehouse is a subject oriented, integrated, time variant, non volatile collection of data in support of management’s decision making process”. In order to store data, over the years, many application designers in each branch have made their individual decisions…
Fact Table | Star Schema: The centralized table in a star schema is called as FACT table. A fact table typically has two types of columns: those that contain facts and those that are foreign keys to dimension tables. The primary key of a fact table is usually a composite key that is made up…
Star Schema: General Information In general, an organization is started to earn money by selling a product or by providing service to the product. An organization may be at one place or may have several branches. When we consider an example of an organization selling products throughout the world, the main four major dimensions are…
