November 1, 2016

Using the SQL MINUS Operator

The SQL MINUS operator makes use of two SQL statements. It takes all the results from the first statement and subtracts out the ones that are present in the second statement to get the final answer. A quick look at how it works: SELECT expression1, expression2, … FROM table1MINUSSELECT expression1,

Explore Polymorphism in Java

Polymorphism is the existence of the same thing in various forms. It is a feature of OOP that enables items to change form based on circumstances. The term polymorphism is derived from two Greek words, namely, “poly” and “morphos.” While the term “poly” means many, and “morphos” which implies forms.