July 2010
Intermediate to advanced
840 pages
16h 33m
English
Content preview from Joe Celko's SQL for Smarties, 3rd Edition
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1.1. What Changed in Ten Years
Hierarchical and network databases still run vital legacy systems in major corporations. SQL people do not like to admit that Fortune 500 companies have more data in IMS files than in SQL tables. But SQL people can live with that, because we have all the new applications and all the important smaller databases.
Object and object-relational databases found niche markets, but never caught on with the mainstream. But OO programming is firmly in place, so object-oriented people can live with that.
XML has become the popular data tool du jour as of this writing in 2005. Technically, XML is syntax for describing and moving data from one platform to another, but its support tools allow searching and reformatting. It seems ...
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