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https://www.thatguyfromdelhi.com/2015/05/basic-olap-support-in-postgresql.html
May 16, 2015 · Although PostgreSQL doesn't support this form of nested-aggregates, it clearly is a neat form of doing things. The alternative, acceptably looks like a kludge, and it would be a nice to have feature. GROUPING SETS
https://www.2ndquadrant.com/en/support/support-postgresql/
24/7 PostgreSQL Support. When it’s critical, you can count on us! If access to your data is critical, 2ndQuadrant guarantees you will have your problems addressed quickly. The PostgreSQL contributors, developers and committers that make up the 2ndQuadrant Professional Support Team are committed to solving issues efficiently and accurately.
http://travellingsysop.net/postgresql/2015/05/olap-support-in-postgresql.html
I learned that OLAP isn't really a PostgreSQL domain but getting basic support for analytical queries will definitely make many tasks easier. There are two main use cases for databases - one can either perform online transaction processing or online analytical processing.
https://www.postgresql.org/about/news/909/
Jan 11, 2008 · Partitioning ROLAP cube tables is supported, using native PostgreSQL interface. Rebuilding the cubes is done in the background, full or incremental and do not requires stopping the database service. o Additional DataMart ROLAP structures in Analytic SQL Server
https://www.postgresql.org/docs/8.4/tutorial-window.html
3.5. Window Functions. A window function performs a calculation across a set of table rows that are somehow related to the current row. This is comparable to the type of calculation that can be done with an aggregate function. But unlike regular aggregate functions, use of a window function does not cause rows to become grouped into a single output row — the rows retain their separate ...
https://www.postgres-xl.org/
Postgres-XL is an all-purpose fully ACID open source scale-out SQL database solution. There are a wide variety of use cases for Postgres-XL: Business Intelligence / Big Data Analytics
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