Online Analytical Processing, also known as OLAP, is an approach to view and analyze multidimensional data from multiple perspectives. Unlike OLTP (online transaction processing), which is useful in transaction processing (involving less complex querying), OLAP deals with business intelligence and thus ...
Data Warehouses , OLAP , Data MiningWarehousing, Data
Sr.No.Data Warehouse (OLAP)Operational Database (OLTP) 1 Involves historical processing of information. Involves day-to-day processing. 2 OLAP systems are used by knowledge workers such as executives, managers and analysts. OLTP systems are used by clerks, DBAs, or database professionals. 3 ...
data warehouseonline analytical processing (OLAP)multidimensional analysisrelational online analytical processing (ROLAP)multidimensional online analytical processing (MOLAP)desktop online analytical processing (DOLAP)This article has no abstract.doi:10.1002/0471221627.ch15Carole Goble...
数据仓库(Datawarehouse)是什么?OLTP以及OLAP的概念 数据仓库,英文名称为Data Warehouse,可简写为DW或DWH。数据仓库是一个支持管理决策的数据集合。数据是面向主题的、集成的、不易丢失的并且是时变的。数据仓库是所有操作环境和外部数据源的快照集合。它并不需要非常精确,因为它必须在特定的时间基础上从操作环境中提取...
数据仓库(Datawarehouse)是什么?OLTP以及OLAP的概念数据仓库,英文名称为Data Warehouse,可简写为DW或DWH。数据仓库是一个支持管理决策的数据集合。数据是面向主题的、集成的、不易丢失的并且是时变的。数据仓库是所有操作环境和外部数据源的快照集合。它并不需要非常精确,因为它必须在特定的时间基础上从操作环境中提取...
Cloud OLAP in Data Warehouses allows calculation of analytical business information using metrics for modeling, planning and forecasting.
Roll-Up: Roll-U6,l6p is a technique for reducing dimensions by combining similar data into a single variable. For example, sales from several cities throughout the world can be combined to form a country. Drill-Down: Drill-Down is the polar opposite of Roll-Up, which separates data for ...
In this paper, we proposed an approach to rewrite a given OLAP query using MVs existing in data warehouses. We defined the normal form of typical OLAP queries and MVs based on the lattice structure derived from dimension hierarchies in DWs. We presented conditions for usability of MVs in rewr...
A multi-dimensional data model Data warehouse architecture Data warehouse implementation From data warehousing to data mining From Tables and Spreadsheets to Data Cubes A data warehouse is based on a multidimensional data model which views data in the form of a data cube A data cube, such as ...