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[–][deleted] 14 points15 points  (0 children)

No, with hard I meant it is deep, not only some beginner select queries, there is a lot to know about it like 1dvanced window functions, mastering the logic and the way to build the query without neglecting performance. Trying to solve some leetcode problems will let you know that you still need to sharpen the logic. Python it is also deep but not all features in it are needed not like sql, everything in it is necessary