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This series of articles will focus on SQL concepts and interview questions, covering basic to advanced topics. The interview series will include fundamental, intermediate, and advanced questions.
Snowflake is one of the most powerful cloud data platforms in the world, and learning SQL on it is a smart move for anyone entering data analytics, engineering, or AI. The best part? You can get started with a free 120-day trial — no credit card requ...
As a data enthusiast and educator, I have created a series of LinkedIn posts aimed at helping aspiring data professionals tackle SQL interview questions effectively. Each post follows a structured format, including the Problem, Schema, Dataset, Solut...
Scenario: An online store wants to identify the top 3 products that were sold the most in June 2023. The sales table contains information about each sale. Question: Write a query to find the IDs of the top 3 products along with the total quantity sol...
What is SQL PIVOT? SQL PIVOT is a powerful and useful feature in SQL Server that allows you to transform data from rows to columns. Essentially, it rotates a table-valued expression by converting unique values from one column in the expression into m...
What is a Common Table Expression (CTE) in SQL? A Common Table Expression (CTE) is a temporary result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement. CTEs are defined using the WITH clause and provide a way to simplif...
Scenario: Your team at a retail company is analyzing monthly sales data to identify trends. Question: Write a query that outputs the name of each product and the difference in the number of units sold between the month with the highest sales and the ...
