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The following tables compare general and technical information for a number of available database administration tools. Please see individual product articles for further information. This article is neither all-inclusive nor necessarily up to date. Systems listed on a light purple background are no longer in active development.
ClickHouse supports an extended SQL-like language that includes arrays and nested data structures, approximate and URI functions, and the availability to connect an external key-value store. High performance. [6] Vector calculations are used. Data is not only stored by columns, but is processed by vectors (parts of columns).
Aggregations are built from the fact table by changing the granularity on specific dimensions and aggregating up data along these dimensions, using an aggregate function (or aggregation function). The number of possible aggregations is determined by every possible combination of dimension granularities.
An object's virtual method table will contain the addresses of the object's dynamically bound methods. Method calls are performed by fetching the method's address from the object's virtual method table. The virtual method table is the same for all objects belonging to the same class, and is therefore typically shared between them.
Microsoft Visual Studio (formerly Python Tools for Visual Studio [53]) Microsoft 16.9 2021-03-02 Windows: C++ and C#: Windows Forms and WPF, through IronPython: Python tools under Apache License 2.0: Yes Yes Yes No Unknown Unknown Unknown Yes [54] Unknown Unknown Yes Basic refactoring Yes Yes MonoDevelop: Novell and the Mono community ...
Views also function as relational tables, but their data are calculated at query time. External tables (in Informix [3] or Oracle, [4] [5] for example) can also be thought of as views. In many systems for computational statistics, such as R and Python's pandas, a data frame or data table is a data type supporting the table
Examples of technologies used in the serving layer include Apache Druid, Apache Pinot, ClickHouse and Tinybird which provide a single platform to handle output from both layers. [9] Dedicated stores used in the serving layer include Apache Cassandra , Apache HBase , Azure Cosmos DB , MongoDB , VoltDB or Elasticsearch for speed-layer output, and ...
In computer science, a dispatch table is a table of pointers or memory addresses to functions or methods. [1] Use of such a table is a common technique when implementing late binding in object-oriented programming .