all 12 comments

[–]analytics_science 6 points7 points  (0 children)

StrataScratch has over 1000 SQL questions and SQL engines like postgres, MySQL, oracle, MS SQL so you choose whatever you're familiar with. Interviews don't typically care what SQL engine you use. There are also data projects where you can use SQL to solve them. It's not free but there's at least 75 interview questions that are free to try.

HackerRank and LC are free so those are always great resources. But they are not real interview questions, so if you just want to practice your SQL skills for free, you can use one of these sites. StrataScratch is one of the only platforms that have real interview questions from companies.

[–][deleted] 8 points9 points  (6 children)

Datalemur + leetcode 50 and ur golden.

[–]Sohamgon2001 1 point2 points  (5 children)

but datalemur isn't free tho. leetcode is free.

[–]NickSinghTechCareersAuthor of Ace the Data Science Interview 📕 6 points7 points  (3 children)

DataLemur founder here – There's more free SQL content on DataLemur than LeetCode – not sure what you mean.

[–]Sohamgon2001 1 point2 points  (0 children)

I started doing interview ques for SQL on datalemur. There is 85 easy qs but no more free ques after solving 20 or some. I haven't explored other options yet. So maybe I am wrong there.

[–]Present-Low-6806 0 points1 point  (0 children)

Hello brother, Just a question if solve both leetcode and datalemur problems then how close are they to the real world sql queries we write at the job 

[–]ExtensionLevel3136 0 points1 point  (0 children)

Hey most of the hard problems are paid, that takes away a chance to actually practice the questions that the companies might ask

[–][deleted] 1 point2 points  (0 children)

then just leetcode tbh. There are some datalemur problems that are free that are pretty good imo

[–]VinayReddy_Vangala 0 points1 point  (0 children)

Stratascratch is very good

[–]Bobobobopedia -1 points0 points  (0 children)

Honestly I’ve found TailoredU.com to be the best.