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Normalization Heuristics
The dictionary definition of a heuristic is “Computers, Mathematics: pertaining to a trial-and-error method of problem solving used when an... Saiba Mais
DownloadI Do Declare
Most of us began programming in procedural languages. But SQL is a declarative language. Chris Date described the difference as “What, not How” in... Saiba Mais
DownloadSQL Syntax Performance.
The 2000 book Me Talk Pretty One Day (ISBN 978-0316777728) is a collection of essays by American humorist David Sedaris. He moved to a rural part of... Saiba Mais
DownloadRelational Division
Dr. Codd’s original relational algebra had eight basic operations. Since RDBMS is based on set theory the first four are traditional set operations:... Saiba Mais
DownloadMaking Time Using Temporal Data
SQL is the first programming language to have temporal data types in it. If COBOL had done this, we would never have had the "Y2K Crisis" we... Saiba Mais
DownloadEAV of Destruction
If you cruise SQL programming newsgroups, you will eventually find a post for what is called EAV (“Entity-Attribute-Value”) tables. It is a very... Saiba Mais
DownloadCardinality is Not for the Birds
Cardinality has nothing to do with song birds or Catholic church officials. It is a term from set theory that deals with the size of a set.... Saiba Mais
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