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Trino is an open-source distributed SQL query engine designed to query large data sets distributed over one or more heterogeneous data sources. [1] Trino can query data lakes that contain a variety of file formats such as simple row-oriented CSV and JSON data files to more performant open column-oriented data file formats like ORC or Parquet [2] [3] residing on different storage systems like ...
The primary front-end for PostgreSQL is the psql command-line program, which can be used to enter SQL queries directly, or execute them from a file. In addition, psql provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating a wide variety of tasks; for example tab completion of object names ...
In 2013, StormDB was acquired by TransLattice, [6] [7] and the improved software was open-sourced under the name "Postgres-XL" in 2014. [8] [9] Since 2015, Postgres-XL development has also been supported by 2ndQuadrant. [4] Postgres-XL provides cluster-wide consistent transaction snapshots [10] [11] via a central Global Transaction Manager (GTM ...
EnterpriseDB (EDB) is an American company that provides software and services based on the open-source database PostgreSQL (also known as Postgres), and is one of the largest contributors to Postgres. [2] EDB develops and integrates performance, security, and manageability enhancements into Postgres to support enterprise-class workloads.
No command can be performed against a database without an "open and available" connection to it. Connections are built by supplying an underlying driver or provider with a connection string , which is a way of addressing a specific database or server and instance as well as user authentication credentials (for example, Server= sql_box; Database ...
According to PostgreSQL v.9 documentation, an SQL window function "performs a calculation across a set of table rows that are somehow related to the current row", in a way similar to aggregate functions. [7] The name recalls signal processing window functions. A window function call always contains an OVER clause.
Before code can access the data, it must open the cursor with the OPEN statement. Directly following a successful opening, the cursor is positioned before the first row in the result set. OPEN cursor_name. Applications position cursors on a specific row in the result set with the FETCH statement. A fetch operation transfers the data of the row ...
Recursive CTEs are also supported by Microsoft SQL Server (since SQL Server 2008 R2), [2] Firebird 2.1, [3] PostgreSQL 8.4+, [4] SQLite 3.8.3+, [5] IBM Informix version 11.50+, CUBRID, MariaDB 10.2+ and MySQL 8.0.1+. [6] Tableau has documentation describing how CTEs can be used. TIBCO Spotfire does not support CTEs, while Oracle 11g Release 2's ...