Revision as of 10:07, 2 July 2019 edit 103.99.109.74 (talk) No edit summary ← Previous edit		Revision as of 05:19, 18 September 2019 edit undo Liubomirwm (talk \| contribs) 20 edits Added Data Mapper pattern and link to ORM. Tag: Visual edit Next edit →
Line 9: Applications using a data access layer can be either database server dependent or independent. If the data access layer supports multiple database types, the application becomes able to use whatever databases the DAL can talk to. In either circumstance, having a data access layer provides a centralized ___location for all calls into the database, and thus makes it easier to port the application to other database systems (assuming that 100% of the database interaction is done in the DAL for a given application). [[Object-Relational Mapping]] tools provide data layers in this fashion, following the [[Active record pattern\|~~active~~Active ~~record~~Record]] ~~model~~or [[Data mapper pattern\|Data Mapper]] patterns. The [[Object-relational mapper\|ORM]]/active-record model is popular with web frameworks. ==See also==

Data access layer: Difference between revisions