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In software, a data access object (DAO) is a pattern that provides an abstract interface to some type of database or other persistence mechanism. By mapping application calls to the persistence layer, the DAO provides data operations without exposing database details. This isolation supports the single responsibility principle.
DAO were originally called "VT Objects.: DAO 1.0 came up in November 1992 as part of Access 1.0. In version 3.5 it was able to bypass the Jet engine all together and directly access ODBC data sources, including Microsoft SQL Server and other enterprise database systems.
DAO: DAO, or Data Access Objects were an object oriented interface created by Microsoft which allowed early versions of Microsoft Access and Visual Basic to access the Jet Database Engine. Later (in version 3.5) it was able to bypass the Jet engine altogether and directly access ODBC data sources. [34]
DAC—Discretionary Access Control; DAL—Database Abstraction Layer; DAO—Data Access Object; DAO—Data Access Objects; DAO—Disk-At-Once; DAP—Directory Access Protocol; DARPA—Defense Advanced Research Projects Agency; DAS—Direct Attached Storage; DAT—Digital Audio Tape; DB—Database; DSKT—Desktop; DBA—Database Administrator
Data access object, a design pattern used in object-oriented software engineering Jet Data Access Objects , a general programming interface for database access on Microsoft Windows systems Disk-at-Once, an optical disc recording mode
If the data access layer supports multiple database types, the application becomes able to use whatever databases the DAL can talk to. In either circumstance, having a data access layer provides a centralized location for all calls into the database, and thus makes it easier to port the application to other database systems (assuming that 100% ...
The Office of Tailored Access Operations (TAO), now Computer Network Operations, and structured as S32, [1] is a cyber-warfare intelligence-gathering unit of the National Security Agency (NSA). [2] It has been active since at least 1998, possibly 1997, but was not named or structured as TAO until "the last days of 2000," according to General ...
Some basic steps are required in order to be able to access and manipulate data using ADO : Create a connection object to connect to the database. Create a recordset object in order to receive data in. Open the connection; Populate the recordset by opening it and passing the desired table name or SQL statement as a parameter to open function.