r/dataanalysiscareers • u/Pangaeax_ • 19h ago
Learning / Training Made a SQL interview cheat sheet for data analyst interviews. What would you add?
Put together this one-page SQL revision sheet for analyst interviews.
I tried to cover the things that tend to matter beyond just remembering syntax: joins, aggregation grain, NULL handling, CTEs, window functions, common interview patterns, and mistakes that can quietly give you the wrong result.
For people who've actually done data analyst interviews, what SQL topic or question pattern would you add?
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u/winstr12 9h ago
Isn't it 1. query order
FROM
WHERE
GROUP BY
HAVING
SELECT
ORDER BY
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u/Ksnku 7h ago
You're listing the order of operations / execution, not order of syntax. Order of operations is a more advanced use case
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u/Parking_Increase4664 4h ago
Yep, if we're talking about the order of execution, then the correct order will be:
FROM
WHERE
GROUP BY
HAVING
SELECT
ORDER BY
2
1
u/nian2326076 1h ago
You might want to add sections on indexing and query optimization. Interviewers often check if you can make queries more efficient, especially with big datasets. Also, consider covering subqueries and how they perform compared to joins. Error handling and transaction management are good to include to show you're thinking about robustness.
I've found PracHub helpful for practicing interview questions and understanding common patterns. They have good material on SQL topics and how they might appear in interviews. Just a suggestion if you want another angle on your prep!
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u/Appropriate_Sugar202 18h ago
Whatever you end up with, make a version that doesn't mention interviews. I'd print and hang this, but the interview mention is off-putting for something that could be used daily. Great job btw!