How much time is needed to learn SQL enough to crack interviews?

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Not more than a week.
Start by practicing it on hackerrank.

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If you go full throttle and your purpose is to only crack interview, I would say give 10 days.You can split your prep in 7-3;start by grasping basic concepts and framing simple queries, learn the logical flow and practice questions based on it.Then venture into slightly more advanced concepts like window functions, framing Combined Table Expressions (CTE) , nested queries. Learn by practising and not by just checking the syntax. The rest 3 days, you can get a download of question bank for interview and work on those and guess what, you will be ready for your next interview.

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MySQL server.

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Just try with some basic CRUD, join and sub query that will be enough

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dm me will teach you in 4 days

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How

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A week to learn, 2-3 days to practice

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Can anyone tell the same thing about Python?

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