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 …

How Does One Choose Between the SQL Right Join Inner vs. Outer in SQL? An SQL Join is an operation of accessing the data from two or more tables or relations. In simple terms, a join occurs whenever multiple tables or relations appear in the FROM clause of a query, as described by Bhanuprakash, Nijagunarya & Jayaram …

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, …

The cursor and usage in embedded SQL The SQL language, by default, uses set-at-a-time processing. While this is used in most SQL queries, sometimes there is a need to loop through the set and execute a stored procedure or many different SQL statements for each row fetched. SELECT statements that return more than one …