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Old hands in database design look for three specific criteria to govern their choice between a check constraint or a separate table that has a foreign key constraint.Note that database design is a mix of art and science and therefore it involves tradeoffs.Figures 2-5 He then decides to combine them all because of the similarity of their columns.
Appropriately enough, Don called these tables Massively Unified Code-Key (MUCK) tables (Peterson, 2006) Though many others have written about it over the years, this name seems to capture most effectively the clumsiness associated with such a structure.
Anith follows up his highly successful article Facts and Fallacies about First Normal Form with a fascinating discussion of five common database design errors which persist in spite of the fact that the unfortunate consequences of their use is so widely known.
It is a needy reminder to anyone who has to design databases.
The solution to the EAV nightmare is simple: Analyze and research the users’ needs and identify the data requirements up-front.
A relational database maintains the integrity and consistency of data.
Sometimes, designers can get caught up in the world of alternative programming “paradigms” and might try to implement them.