Sql Interview Questions

SQL (Structured Query Language) is one of the most in-demand skills in today’s job market. As a result, SQL interviews can be incredibly competitive and challenging. As someone who has gone through over four SQL interviews, I have learned a lot about what to expect and how to prepare. In…

In this post, I provide a roadmap for learning SQL. After spending countless years grudgingly combing through many SQL learning resources I’m excited to share with you what I think is the best way to learn SQL. …

1.How to find duplicates in a table? Use a SELECT statement with a GROUP BY clause and the COUNT function to identify rows with duplicate values in a specific column. For example: SELECT column1, COUNT(*) FROM table GROUP BY column1 HAVING COUNT(*) > 1; 2. How to delete duplicates from…

Often used clauses with aggregate functions in SQL statements. — Through this article, we’ll learn what is Group by and Having clauses, when to use these clauses, and how they are different than the where clause. The questions on these two clauses are mostly asked in SQL-focused interviews. What Does the Group by Clause Do? The SQL GROUP BY clause is often used with the SELECT statement…

In the 21st century, Business Analyst is the hottest job on the market. And being prepared for the technical questions is quite imperative to get the job. If one has to prepare for the job role, SQL is an important tool that is widely and majorly used in the field. …

In this tutorial, we will learn the step by step approach to solving complex SQL Queries. We will solve 10 SQL queries , ranging from intermediate to complex levels of difficulty. We are going to work on the Employee data. Below are the Create and Insert scripts for this table. …