Key Differences Between Data Warehouse and Data Mart 1.     Data warehouse is application-independent whereas data mart is specific to decision support system application. 2.     The data is stored in a single,  centralized  repository in a data warehouse. As against, data mart stores data  decentrally  in the user area. 3.     Data warehouse contains a  detailed  form of data. In contrast, a data mart contains  summarized  and selected data. 4.     The data in a data warehouse is  slightly  denormalized while in the case of Datamart it is  highly  denormalized. 5.     The construction of a data warehouse involves a  top-down  approach. Conversely, while constructing a data mart the  bottom-up  approach is used. 6.     Data warehouse is  flexible ,  information-oriented,  and longtime e...