What are the Unique key and Primary keys in SQL?

What are the Unique key and Primary keys in SQL? In this article, we will see What is the Unique key and Primary key in SQL? This comes under one of the most frequently asked interview questions. Before we discuss the difference between these two let us see what is the primary key and unique … Read more

The Major difference between UNION and UNION ALL? | SQL Queries

Here we will see the major difference between union and union all with practical examples. After reading this article you will have a very clear understanding of this topic. It is one of the commonly asked interview questions. One should answer this because it is a very basic concept of SQL. We often confuse when … Read more