Demystifying SQL Retrieval Queries A Step-by-Step Breakdown
Feb 15, 2024 · 4 min read · database-programming sql-tutorial data-management relational-databases ·How Is SQL Query Retrieved, and Conceptually, What Is The Order oF Executing Each of The Six Clauses? SQL or the Structured Query Language described by Bowman, Emerson, & Darnovsky (1997) was proposed in 1970 by Dr. E. F. Codd at IBM and developed the SQL language over the next decade at research facilities and …
Read MoreUnveiling Attribute & Relationship Inheritance in EER Diagrams
Feb 13, 2024 · 3 min read · database-programming sql-tutorial data-management relational-databases ·The Mechanism of Attribute/Relationship Inheritance and Why it Useful The enhanced entity-relationship (EER) diagram includes the principles of the entity-relationship diagram with the addition of some other concepts as described by Tupper (2011). The additional concepts include subclasses and superclasses, …
Read MoreMapping EER Model Constructs to Relations in Your Database
Feb 10, 2024 · 3 min read · database-modeling data-management relational-theory database-programming relational-databases ·The Options for Mapping EER Model Constructs to Relations There are many ways of mapping the constructs from the EER model into the relational model. There are mapping of specializations or generalizations, shared subclasses, or multiple inheritance and categories. Several options are available for mapping several …
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