Basic SQL Interview Questions for Freshers 1. What is the difference between a primary key and a unique key? Primary Key: The primary key is used to uniquely identify every record in a table. It ensures that NULL values are not present in the table. Unique Key: Unique key also identifie...
In this article, you will learn many simple and complex SQL queries asked in IT interviews. Let's take two tables which help in solving various queries. The name of the first table isStudent,and the name of the second table isSubject. The Student table consists ofStudent_ID, Stu_Name, ...
Clearly, the demand for Spark SQL professionals is quite high. We are certain that these interview questions will help you bag your dream job and make the process a whole lot easier. For easy understanding, we have divided the questions into two categories that is, For Freshers For Experienced...
The number of interview questions in number example might not be as big as the other material, but this guide provides something that the other guide doesn’t; for example, a breakdown category detail on what question to expect, the strategy to answer the interview, and common SQL concepts f...
This site caters to the requirements of students who aspire to prepare and develop Reasoning, Non-Verbal & Verbal, skills for various competitive examinations. Varius interview questions available.