In this video, I walk you through a common SQL interview question involving sales data analysis. We focus on writing a query to display each year's sales, the previous year's sales, and the difference between them using the lag window function. I also explain the importance of lead and lag functions in SQL interviews. Please make sure to practice this query and familiarize yourself with the concepts discussed.
00:00 Introduction to SQL Series
01:40 Executing the Query
04:50 Using Common Table Expressions
#sql #sqlinterview #sqlinterviewquestionsandanswers #sqlinterviewquestions #dataengineering #dataanalytics #dataanalysis #datascience #bigdata #bigdatatraining #sqlforbeginners #bigdata #bigdatatraining
