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Developers perspective of SAP HANA how HANA can reduce the development complexity and big bang for the buck : In-memory Faster access to data which is predominantly stored in-memory rather than on disk with the use of buffers with limited space for only very frequently accessed data as is with traditional databases… Columnar stored tables… Read More... Bill Inmon's paradigm: Data warehouse is one part of the overall business intelligence system. An enterprise has one data warehouse, and data marts source their information from the data warehouse. In the data warehouse, information is stored in 3rd normal form. Inmon's approach, also called top-down, is to have "one version of the truth", a… Read More... Relational model The relational model is used in transactional systems where many transactions are executed, most of them concurrently. A transaction inserts, updates or in any other way processes data in a database. In many occasions a transaction is an integral part of the business..