Applications, Implementation, Merits and Limitations of Data vault in Data warehouse Abstract- Business companies face many obstacles in exploiting and studying data performed in diverse resources. Data vault is the latest data warehouse technique which caters the business needs of flexibility, scalability, agility and large level of data storage which the preceding existing models neglect to bestow. Simple data vault structures, applications of data vault to boost technology, merits and limitations of data vault are proposed in the review. Data vault 2. 0 a latest technique which can triumph over certain limits of data vault is also suggested. Keywords-Data vault; Data vault 2. 0; Data Warehouse Data warehouse is a subject-oriented, included, time-varying, non-volatile collection of data that is utilized mainly in organizational decision making.