Search results
Results from the WOW.Com Content Network
A pivot table is a table of values which are aggregations of groups of individual values from a more extensive table (such as from a database, spreadsheet, or business intelligence program) within one or more discrete categories. The aggregations or summaries of the groups of the individual terms might include sums, averages, counts, or other ...
Queries can be nested so that the results of one query can be used in another query via a relational operator or aggregation function. A nested query is also known as a subquery. While joins and other table operations provide computationally superior (i.e. faster) alternatives in many cases, the use of subqueries introduces a hierarchy in ...
Beyond the multidimensional data concept, Palo enables multiple users to share one centralised data storage (single version of the truth). This type of database is suitable to handle complex data models for business management and statistics. Apart from multidimensional queries, data can also be written back and consolidated in real-time.
Queries can be nested so that the results of one query can be used in another query via a relational operator or aggregation function. A nested query is also known as a subquery . While joins and other table operations provide computationally superior (i.e. faster) alternatives in many cases (all depending on implementation), the use of ...
Tableau Software originated at Stanford University as a government-sponsored research project to investigate new ways for users to interact with relational and OLAP databases. Hyperion and Tableau together built fundamentally the first versions of Tableau Software which was designed specifically for multidimensional (OLAP) databases.
Apache Hive is a data warehouse software project. It is built on top of Apache Hadoop for providing data query and analysis. [3] [4] Hive gives an SQL-like interface to query data stored in various databases and file systems that integrate with Hadoop.
In-memory data structures: One can use hash tables and two-dimensional arrays in memory in conjunction with attribute-grouping metadata to pivot data, one group at a time. This data is written to disk as a flat delimited file, with the internal names for each attribute in the first row: this format can be readily bulk-imported into a relational ...
Project Crescent was initially available for public download on 11 July 2011, bundled with SQL Server Codename Denali. [14] Later renamed Power BI it was then unveiled by Microsoft in September 2013 as Power BI for Office 365. [15] The first release of Power BI was based on the Microsoft Excel-based add-ins: Power Query, Power Pivot and