Data Marts Datamart can be defined as the subset of a data warehouse of an organization which is limited to a specific business unit or group of users. It is a subject-oriented database and is also known as High-Performance Query Structures (HPQS). Types of Data Marts Data marts are of two types – Dependent and Independent. Dependent Data Mart – This data mart depends on the enterprise data warehouse and works in a top-down manner. Independent Data Mart – This data mart does not depend on the enterprise data warehouse and works in a bottom-up manner. Watch this Informatica video Benefits of Data Marts Allows the data to be accessed in lesser time Cost-efficient alternative to the bulky data warehouse Easy to use as designed according to the needs of a specific user group Fastens business processes.