|Newer page:||version 2||Last edited on Tuesday, January 25, 2011 5:43:01 pm||by AristotlePagaltzis|
|Older page:||version 1||Last edited on Wednesday, September 10, 2003 10:50:14 pm||by StuartYeates||Revert|
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[RelationalDataBase]s proved very powerful but somewhat hard to use for mortals, leading to their extension. Typical extensions include:
# Procedural extensions to [SQL]. These lead to the current plathora of SQL variants--everyone extended SQL differently.
# Extensions to the relation structure to allow for variable sized fields, particularly for string data. These have much less impact than the procedural extensions to [SQL] and are largely implemented by making fields pointers to the data rather than the data itself.
Most real-world databases are [PostRelationalDataBase]s
[Oracle], [MySQL], [PostgreSQL], [Microsoft] [SQL] Server, Informix, Borland Interbase, [FireBird] and [IBM] [DB2]
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