Data Access Language: Difference between revisions

Revision as of 00:17, 17 December 2009

Revision as of 16:24, 3 April 2010

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For much of the 1990s a direct-DAL database server was available on the Macintosh, '''Butler'''. However, like any server software on the "classic" Mac OS, Butler was seriously hampered by the Mac's single-user [[file system]] and [[Computer multitasking|multitasking]] and could never really deliver the sort of performance the same server would have on [[Windows NT]] or [[Unix]].

One of the more common clients for DAM was [[HyperCard]]. The combination of HyperCard and DAL presented a serious challenge to existing vendors who could offer nothing with a GUI. Apple gave a series of demos of HyperCard/DAL, and soon [[Oracle Corporation]] purchased a HyperCard-clone, [[WinPlus|PLUS]] from [[Spinnaker Software]], to produce [[Oracle Card]].

The [[PrimeBase]] division of German software developer SNAP Innovation GmbH continues to support DAL in their cross platform SQL database server. Their extended version of DAL is called PrimeBaseTalk (PBT) and is fully backward compatible with DAL. Their architecture does not include Data Access Manager and the resulting performance gains are considerable.