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By then, Microsoft had already granted Visigenic Software a source code license to develop ODBC on non-Windows platforms. Visigenic ported ODBC to the classic Mac OS, and a wide variety of Unix platforms, where ODBC quickly became the de facto standard. [15] "Real" CLI is rare today.
Later (in version 3.5) it was able to bypass the Jet engine altogether and directly access ODBC data sources. [34] RDO: Remote Data Objects, or RDO, was a Microsoft technology that allowed for the creation of interfaces that directly called on ODBC. RDO version 2.0 was the final version developed by Microsoft.
The system administrator of a client machine generally creates a separate DSN for each relevant data source. Standardizing DSNs offers a level of indirection ; various applications (for example: Apache / PHP and IIS / ASP ) can take advantage of this in accessing shared data sources.
Free and open-source software portal unixODBC is an open-source project that implements the Open Database Connectivity ( ODBC ) API . [ 2 ] The code is provided under the GNU GPL / LGPL and can be built and used on many different operating systems, including most versions of Unix , Linux , Mac OS X , IBM OS/2 and Microsoft's Interix .
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 3.6 shipped with Jet 4.0.
OLE DB providers are analogous to ODBC drivers, JDBC drivers, and ADO.NET data providers. OLE DB providers can be created to access such simple data stores as a text file and spreadsheet, through to such complex databases as Oracle, Microsoft SQL Server, Sybase ASE, and many others. It can also provide access to hierarchical data stores such as ...
Access allows users to view and manipulate the SQL code if desired. Any Access table, including linked tables from different data sources, can be used in a query. Access also supports the creation of "pass-through queries". These snippets of SQL code can address external data sources through the use of ODBC connections on the local machine.
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