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Single Table Inheritance

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This is an old revision of this page, as edited by Bobcompu (talk | contribs) at 01:13, 3 November 2015 (Add explanation of how it's implemented. More info on .net entity framework.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Single table inheritance is a way to emulate object-oriented inheritance in a relational database. When mapping from a database table to an object in an object-oriented language, a field in the database identifies what class in the hierarchy the object belongs to.[1] All fields of all the classes are stored in the same table, hence the name "Single Table Inheritance". In Ruby on Rails the field in the table called 'type' identifies the name of the class. In .NET Entity Framework this pattern is called Table-Per-Hierarchy (TPH)[2], and the column containing the class name is called the Discriminator column.

See also

References

  1. ^ Martin Fowler Patterns of Enterprise Application Architecture (2003), p. 278
  2. ^ [1]. Implementing Inheritance with the Entity Framework 6 in an ASP.NET MVC 5 Application (11 of 12), Retrieved November 3, 2015


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