What is SAP HANA
SAP HANA is an in-memory computing platform that has completely transformed the relational database industry. It combines database, application processing, and integration services on a single platform.
SAP HANA is an in-memory data platform that is deployable as an on-premise appliance, or in the cloud. It is a revolutionary platform that’s best suited for performing real-time analytics, and developing and deploying real-time applications.
SAP HANA
Core process accelerators – Accelerate business reporting by leveraging ERP Accelerators, which are non-disruptive ways to take advantage of in-memory technology. These solutions involve an SAP HANA database sitting next to a customer’s SAP ERP system. Transactional data is replicated in real-time from ECC into HANA for immediate reporting, and then results can even be fed back into ECC. Solutions include CO-PA Accelerator, Finance and Controlling Accelerator, Customer Segmentation Accelerator, Sales Pipeline Analysis.
SAP Hana
Data Warehousing SAP NetWeaver BW on HANA – BW customers can run their entire BW application on the SAP HANA platform leading to unprecedented BW performance (queries run 10-100 times faster; data loads 510 times faster; calculations run 5-10 times faster), a dramatically simplified IT landscape (leads to greater operational efficiency and reduced waste), and a business community able to make faster decisions. Moreover, not only is the BW investment of these customers preserved but also supercharged. Customers can migrate with ease to the SAP HANA database without impacting the BW application layer at all.
SAP HANA
SAP HANA can accommodate multiple clients across multiple instances to provide access to useful data across a number of related applications.SAP HANA can also connect via an optional module (XS Engine) to a Client Application via HTTP/S. This is helpful for obtaining thirdparty data or data from disparate locations.
It is currently not recommended to attach more than one ERP per instance of SAP HANA due to potential for table name replication
SAP HANA 
Metadata can be accessed via the Metadata Manager component. In the SAP HANA database, metadata comprises a variety of objects, such as definitions of relational tables, columns, views, indexes and procedures.
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Metadata of all these types is stored in one common database catalog for all stores. The database catalog is stored in tables in the Row Store. The features of the SAP HANA database such as transaction support and multi-version concurrency control, are also used for metadata management.
SAP HANA 
SAP HANA allows granting of privileges to users or roles. A privilege grants the right to perform a specified operation (such as create, update, select, execute, and so on) on a specified object (for example a table, view, SQLScript function, and so on).
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The SAP HANA database supports Analytic Privileges that represent filters or hierarchy drilldown limitations for analytic queries. Analytic privileges grant access to values with a certain combination of dimension attributes. This is used to restrict access to a cube with some values of the dimensional attributes.
SAP HANA
The SAP HANA Database processes individual SQL statements as transactions.
The Transaction Manager controls and coordinates transactions and sends relevant data to appropriate engines and to the Persistence Layer. This segmentation simplifies administration and troubleshooting.
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