9. Multidimensional analysis of OLAP

    On Line Analytical Processing (OLAP) is one of the important applications in the current data warehouse. It is the key to decision-making analysis and the most important multi-dimensional analysis tool of the data warehouse. It uses the data stored in the data warehouse to complete various tasks. analysis operations and return the analysis results to decision-makers in an intuitive and easy-to-understand form. Its goal is to meet the specific query and reporting needs of decision support or multi-dimensional environments. The core of the technology is multi-dimensional analysis.
    The analysis functions implemented by the OLAP engine include: establishing multi-dimensional models, parsing MDX statements, and returning analysis results. Traditional foreign database manufacturers have launched their own OLAP analysis tools. Microsoft has issued the MDX language standard, and SQL SERVER Analysis Service is its commercial OLAP engine. The main open source community OLAP product is the Mondrian OLAP engine.
    Mondrian is part of the open source project Pentaho and is an OLAP engine written in Java. It implements MDX language, XML parsing, and JOLAP specifications. It reads data from SQL and other data sources and aggregates the data in the memory cache, and then displays the results in a multi-dimensional manner through the Java API. At the same time, it can analyze huge data sets stored in SQL databases without writing SQL. Encapsulate JDBC data sources and display the data in a multi-dimensional manner.
    JPivot is Mondrian's default presentation layer tool. It is a JSP custom tag library that can draw OLAP analysis charts. Users can perform typical OLAP navigation such as drilling down and slicing.
    The databases or data warehouses supported by J Mondrian mainly include: LucidDb, Oracle, Access, Mysql, Sybase, Ingres, Postgres, Hypersonic, and Teredata.
    Our multidimensional analysis uses Mondrian as the OLAP engine, Jpivot as the presentation layer, and uses WCF, XML, and XSLT to present the visual components of the web.
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D:\workspace\bak\mondrianServer
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