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The term OLAP was created as a slight modification of the traditional database term online transaction processing (OLTP). [2] OLAP is part of the broader category of business intelligence, which also encompasses relational databases, report writing and data mining. [3]
To increase the performance of an OLTP system, a designer must avoid excessive use of indexes and clusters. The following elements are crucial for the performance of OLTP systems: [4] Rollback segments: Rollback segments are the portions of database that record the actions of transactions in the event that a transaction is rolled back.
Since the early 1990s, the operational database software market has been largely taken over by SQL engines. In 2014, the operational DBMS market (formerly OLTP) was evolving dramatically, with new, innovative entrants and incumbents supporting the growing use of unstructured data and NoSQL DBMS engines, as well as XML databases and NewSQL databases.
As of Oracle Database 11g, the Oracle database optimizer can transparently redirect SQL queries to levels within the OLAP Option cubes. The cubes are managed and can take the place of multi-dimensional materialized views, simplifying Oracle data-warehouse management and speeding up query response.
ETL diagram in the context of online transaction processing [1] In online transaction processing (OLTP) applications, changes from individual OLTP instances are detected and logged into a snapshot, or batch, of updates. An ETL instance can be used to periodically collect all of these batches, transform them into a common format, and load them ...
Rather than two or three dimensions: row, column and sheet, the functional model supports as many dimensions as are necessary. Another advantage of the functional model is that it is a database with features such as data independence, concurrent multiuser access, integrity, scalability, security, audit trail, backup/recovery, and data integration.
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Mondrian OLAP server: Pentaho [14] 3.7 EPL: free Oracle Database OLAP Option: Oracle [15] 11g R2 Proprietary: SAP NetWeaver BW: SAP [16] 7.30 Proprietary - SAS OLAP Server: SAS Institute [17] 9.4 Proprietary - StarRocks: Linux Foundation [18] 3.1 Apache 2.0: free