Data Analyst SQL Interview Question | LAG Function | Previous Day Comparison #dataanalysis #sql

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Learn one of the most asked SQL interview questions for data analyst is to compare previous and current rows. We can compare the compare previous days users to current day users using an LAG function which is a Windows function.
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Hi, i just found your channel recently and I really want to thank you for all of your contents. I just started learning data through DataCamp but most of the time I don't really understand what and how to use most of the syntaxes. After watching your videos about answering questions, I started to understand more. 😊

melantakwarrior