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  2. Database transaction schedule - Wikipedia

    en.wikipedia.org/wiki/Database_transaction_schedule

    In the fields of databases and transaction processing (transaction management), a schedule (or history) of a system is an abstract model to describe the order of executions in a set of transactions running in the system.

  3. Object Data Management Group - Wikipedia

    en.wikipedia.org/wiki/Object_Data_Management_Group

    Object Model. This was based on the Object Management Group's Object Model. The OMG core model was designed to be a common denominator for object request brokers, object database systems, object programming languages, etc.

  4. Database - Wikipedia

    en.wikipedia.org/wiki/Database

    In computing, a database is an organized collection of data or a type of data store based on the use of a database management system (DBMS), the software that interacts with end users, applications, and the database itself to capture and analyze the data. The DBMS additionally encompasses the core facilities provided to administer the database.

  5. Multiple granularity locking - Wikipedia

    en.wikipedia.org/wiki/Multiple_granularity_locking

    In computer science, multiple granularity locking (MGL) is a locking method used in database management systems (DBMS) and relational databases. In multiple granularity locking, locks are set on objects that contain other objects. MGL exploits the hierarchical nature of the contains relationship.

  6. Deductive database - Wikipedia

    en.wikipedia.org/wiki/Deductive_database

    A deductive database is a database system that can make deductions (i.e. conclude additional facts) based on rules and facts stored in its database. Datalog is the language typically used to specify facts, rules and queries in deductive databases.

  7. Armstrong's axioms - Wikipedia

    en.wikipedia.org/wiki/Armstrong's_axioms

    Given a set of functional dependencies , an Armstrong relation is a relation which satisfies all the functional dependencies in the closure + and only those dependencies. . Unfortunately, the minimum-size Armstrong relation for a given set of dependencies can have a size which is an exponential function of the number of attributes in the dependencies conside

  8. Semantic data model - Wikipedia

    en.wikipedia.org/wiki/Semantic_data_model

    The logical data structure of a database management system (DBMS), whether hierarchical, network, or relational, cannot totally satisfy the requirements for a conceptual definition of data, because it is limited in scope and biased toward the implementation strategy employed by the DBMS.

  9. Cardinality (data modeling) - Wikipedia

    en.wikipedia.org/wiki/Cardinality_(data_modeling)

    For example, consider a database of electronic health records.Such a database could contain tables like the following: A doctor table with information about physicians.; A patient table for medical subjects undergoing treatment.