Viewpoint: Top Five Reasons to Migrate from CA AllFusion ERwin Data Modeler to Embarcadero ER/Studio
- ER/Studio
Tech Notes: Migrating from Erwin to ER/Studio Data Modeling Solutions
- ER/Studio
Normalization Heuristics
The dictionary definition of a heuristic is “Computers, Mathematics: pertaining to a trial-and-error method of problem solving used when an... En savoir plus…
TéléchargerI 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... En savoir plus…
TéléchargerSQL 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... En savoir plus…
TéléchargerRelational 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:... En savoir plus…
TéléchargerMaking 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... En savoir plus…
TéléchargerEAV 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... En savoir plus…
TéléchargerCardinality 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.... En savoir plus…
TéléchargerAll skewed up
Pick any two positive integers. Add them and get a third number. Then use the last two numbers and do it again. And again, for a long time. Finally,... En savoir plus…
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