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  2. Access Database Engine - Wikipedia

    en.wikipedia.org/wiki/Access_Database_Engine

    The Access Database Engine (also Office Access Connectivity Engine or ACE and formerly Microsoft Jet Database Engine, Microsoft JET Engine or simply Jet) is a database engine on which several Microsoft products have been built.

  3. Concurrency control - Wikipedia

    en.wikipedia.org/wiki/Concurrency_control

    Thus concurrency control is an essential element for correctness in any system where two database transactions or more, executed with time overlap, can access the same data, e.g., virtually in any general-purpose database system. Consequently, a vast body of related research has been accumulated since database systems emerged in the early 1970s.

  4. Codd's 12 rules - Wikipedia

    en.wikipedia.org/wiki/Codd's_12_rules

    Codd's twelve rules are a set of thirteen rules (numbered zero to twelve) proposed by Edgar F. Codd, a pioneer of the relational model for databases, designed to define what is required from a database management system in order for it to be considered relational, i.e., a relational database management system (RDBMS).

  5. Ensembl genome database project - Wikipedia

    en.wikipedia.org/wiki/Ensembl_genome_database...

    Ensembl genome database project is a scientific project at the European Bioinformatics Institute, which was launched in 1999 in response to the imminent completion of the Human Genome Project. Ensembl aims to provide a centralized resource for geneticists, molecular biologists and other researchers studying the genomes of our own species and ...

  6. Category:Relational database management systems - Wikipedia

    en.wikipedia.org/wiki/Category:Relational...

    Pages in category "Relational database management systems" The following 71 pages are in this category, out of 71 total. This list may not reflect recent changes ().

  7. File system - Wikipedia

    en.wikipedia.org/wiki/File_system

    A filename (or file name) is used to identify a storage location in the file system.Most file systems have restrictions on the length of filenames. In some file systems, filenames are not case sensitive (i.e., the names MYFILE and myfile refer to the same file in a directory); in others, filenames are case sensitive (i.e., the names MYFILE, MyFile, and myfile refer to three separate files that ...

  8. Database index - Wikipedia

    en.wikipedia.org/wiki/Database_index

    A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of additional writes and storage space to maintain the index data structure. Indexes are used to quickly locate data without having to search every row in a database table every time a database table is accessed.

  9. Isolation (database systems) - Wikipedia

    en.wikipedia.org/wiki/Isolation_(database_systems)

    In database systems, isolation determines how transaction integrity is visible to other users and systems.. A lower isolation level increases the ability of many users to access the same data at the same time, but increases the number of concurrency effects (such as dirty reads or lost updates) users might encounter.