Data Access Language: Difference between revisions

Revision as of 12:40, 22 November 2006

Revision as of 19:08, 31 January 2007

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'''Data Access Language''', or simply '''DAL''', was a [[SQL]]-like language parser released by [[Apple Computer]] in 1990 to provide unified [[client/server]] access to [[database management system]]s. It was known for poor performance and high costs, something Apple did little to address over its short lifetime at Apple. These days, DAL enjoys a healthy, high performance life in [[PrimeBase]] SQL servers from SNAP Innovation GmbH.

==History==

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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, 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 PrimebaseTalkPrimeBaseTalk (PBT) and is fully backward compatible with DAL. Their architecture does not include Data Access Manager and the resulting performance gains are considerable.

[[Category:Mac OS development]]