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  2. Data control language - Wikipedia

    en.wikipedia.org/wiki/Data_Control_Language

    GRANT to allow specified users to perform specified tasks. REVOKE to remove the user accessibility to database object . The operations for which privileges may be granted to or revoked from a user or role apply to both the Data definition language (DDL) and the Data manipulation language (DML), and may include CONNECT , SELECT , INSERT , UPDATE ...

  3. Attribute-based access control - Wikipedia

    en.wikipedia.org/wiki/Attribute-based_access_control

    Object attributes: attributes that describe the object (or resource) being accessed e.g. the object type (medical record, bank account), the department, the classification or sensitivity, the location; Contextual (environment) attributes: attributes that deal with time, location or dynamic aspects of the access control scenario [7]

  4. Mandatory access control - Wikipedia

    en.wikipedia.org/wiki/Mandatory_access_control

    In some systems, users have the authority to decide whether to grant access to any other user. To allow that, all users have clearances for all data. This is not necessarily true of an MLS system. If individuals or processes exist that may be denied access to any of the data in the system environment, then the system must be trusted to enforce MAC.

  5. SQL - Wikipedia

    en.wikipedia.org/wiki/SQL

    SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...

  6. Computer access control - Wikipedia

    en.wikipedia.org/wiki/Computer_access_control

    The user has to prove so-called claims about his or her attributes to the access control engine. An attribute-based access control policy specifies which claims need to be satisfied in order to grant access to an object. For instance the claim could be "older than 18". Any user that can prove this claim is granted access.

  7. Record locking - Wikipedia

    en.wikipedia.org/wiki/Record_locking

    To allow several users to edit a database table at the same time and also prevent inconsistencies created by unrestricted access, a single record can be locked when retrieved for editing or updating. Anyone attempting to retrieve the same record for editing is denied write access because of the lock (although, depending on the implementation ...

  8. Transact-SQL - Wikipedia

    en.wikipedia.org/wiki/Transact-SQL

    Transact-SQL is central to using Microsoft SQL Server. All applications that communicate with an instance of SQL Server do so by sending Transact-SQL statements to the server, regardless of the user interface of the application. Stored procedures in SQL Server are executable server-side routines. The advantage of stored procedures is the ...

  9. Database transaction - Wikipedia

    en.wikipedia.org/wiki/Database_transaction

    Users of database systems consider consistency and integrity of data as highly important. A simple transaction is usually issued to the database system in a language like SQL wrapped in a transaction, using a pattern similar to the following: Begin the transaction. Execute a set of data manipulations and/or queries.