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The connection object is ADO's connection to a data store via OLE DB. The connection object stores information about the session and provides methods of connecting to the data store. As some data stores have different methods of establishing a connection, some methods may not be supported in the connection object for particular OLE DB provider.
The latest version of MDAC (2.8) consists of several interacting components, all of which are Windows specific except for ODBC (which is available on several platforms). ). MDAC architecture may be viewed as three layers: a programming interface layer, consisting of ADO and ADO.NET, a database access layer developed by database vendors such as Oracle and Microsoft (OLE DB, .NET managed ...
OLE DB (Object Linking and Embedding, Database, sometimes written as OLEDB or OLE-DB) is an API designed by Microsoft that allows accessing data from a variety of sources in a uniform manner. The API provides a set of interfaces implemented using the Component Object Model (COM); it is otherwise unrelated to OLE .
An OLE DB-ODBC bridge consists of an OLE DB Provider which uses the services of an ODBC driver to connect to a target database. This provider translates OLE DB method calls into ODBC function calls. Programmers usually use such a bridge when a given database lacks an OLE DB provider, but is accessible through an ODBC driver.
Once a connection has been built it can be opened and closed at will, and properties (such as the command time-out length, or transaction, if one exists) can be set. The Connection String is composed of a set of key/value pairs as dictated by the data access interface and data provider being used.
Internet Information Server 3.0 3.5 SQL Server 7.0 4.0 Redistributable installers: Jet 3.51 web download 3.5+ MDAC 2.1 4.0 SP1 MDAC 2.5 4.0 SP3 to SP6+ Jet 4.0 4.0 SP3 to SP8 2007 Office System Driver ACE 12 Microsoft Access Database Engine 2010 ACE 14 Microsoft Access Database Engine 2013: ACE 15 Microsoft Access Database Engine 2016: ACE 16
An additional solution, the SQL Server Migration Assistant for Access (SSMA), continues to be available for free download from Microsoft. [54] A variety of upgrading options are available. [55] After migrating the data and queries to SQL Server, the Access database can be linked to the SQL database, subject to data type conversion limitations:
Microsoft SQL Server (Structured Query Language) is a proprietary relational database management system developed by Microsoft.As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).