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Learn about the history, architecture, features and compatibility of the Access Database Engine, a database engine used by Microsoft products. The Access Database Engine has been superseded by SQL Server for larger databases and supports SQL queries, Unicode, views and replication.
Microsoft Access is a relational database program from Microsoft that combines a graphical user interface and software-development tools. It can store data in its own format or import or link to other databases, and supports Visual Basic for Applications programming language.
CRUD stands for create, read, update, and delete, the four basic operations of persistent storage. Learn how CRUD is used in databases, RESTful APIs, user interfaces, and other contexts, and see different variations of CRUD.
MDAC is a framework of Microsoft technologies for accessing various data sources on Windows. The latest version is 2.8 SP1, released in May 2005, and includes ADO, OLE DB, ODBC, and Net-Lib.
Since the Leszynski naming convention is a special form of Hungarian notation the same general advantages also apply to the Leszynski convention.. The use of distinctive prefixes makes your database self-documenting; when you see frmSales in VBA code, you will know that it references a form, and when you see curSales you will know that it is a Currency variable.
OLE DB is an API that allows accessing data from various sources in a uniform manner. It is part of the Microsoft Data Access Components (MDAC) and supports different types of data stores, such as relational, object, and hierarchical databases.
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 3.6 shipped with Jet 4.0. Access 2007 and later uses ACE with its ACEDAO, where most new features supported by ACE are added to. ACEDAO no longer supports ODBCDirect.
Learn about ADO, a set of COM objects for accessing data sources via OLE DB. ADO provides a middleware layer between programming languages and databases, and supports SQL commands, parameters, transactions and streams.