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Queries like 'select 1 + 1' can be run without a "from" clause/table name. [5] MySQL allows DUAL to be specified as a table in queries that do not need data from any tables. [6] It is suitable for use in selecting a result function such as SYSDATE() or USER(), although it is not essential. PostgreSQL: A DUAL-view can be added to ease porting ...
MySQL (/ ˌ m aɪ ˌ ɛ s ˌ k juː ˈ ɛ l /) [6] is an open-source relational database management system (RDBMS). [6] [7] Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, [1] and "SQL", the acronym for Structured Query Language.
MariaDB is intended to maintain high compatibility with MySQL, with exact matching with MySQL APIs and commands, allowing it in many cases to function as a drop-in replacement for MySQL. However, new features are diverging. [ 7 ]
In the Oracle implementation, a 'database' is a set of files which contains the data while the 'instance' is a set of processes (and memory) through which a database is accessed. Informix supports multiple databases in a server instance like MySQL.
Unlike other operating systems, Linux and Unix allow any file system regardless of the medium it is stored on, whether that medium is a magnetic disk, an optical disk (CD, DVD, etc.), a USB flash memory key, or even contained within a file located on another file system.
Ubuntu is by far the most popular Linux distribution for running web servers; of the websites they analyse it is "used by 47.3% of all the websites who use Linux", [160] and Ubuntu alone powers more websites than Microsoft Windows, which powers 28.2% of all websites, or 39% of the share Unix has (which includes Linux and thus Ubuntu). All Linux ...
Like Access, it can be used to create small embedded databases that are stored with the document files (using Java-based HSQLDB and C++ based Firebird as its storage engine), and for more demanding tasks it can also be used as a front-end for various database management systems, including Access Database Engine (ACE/JET), ODBC/JDBC data sources ...
The Oracle Zero Data Loss Recovery Appliance [1] (Recovery Appliance or ZDLRA) is a computing platform that includes Oracle Corporation (Oracle) Engineered Systems hardware and software built for backup and recovery of the Oracle Database.