The following advanced-level SQL problems. LeetCode 262Trips and Users (Hard) [link] SELECT request_at AS Day, ROUND(SU

The following advanced-level SQL problems. LeetCode 1159Market Analysis II (Hard) [link] SELECT u.user_id AS seller_id,

The following advanced-level SQL problems. Focusing on reshaping tables. LeetCode 618Students Report by Geography (Hard)

The following advanced-level SQL problems. LeetCode 569Median Employee Salary (Hard) [link] If the occurrence is odd, me

The following advanced-level SQL problems are about ‘Recursion, Dependency, Nesting’. Focusing on creating new tables. L

The following basic-level SQL problems. LeetCode 1204Last Person to Fit in the Bus (Medium) [link] SELECT person_name FR

The following basic-level SQL problems. LeetCode 1107New Users Daily Count (Medium) [link] SELECT login_date, COUNT(*) A

Solution to LeetCode 39 Combination Sum, LeetCode 40 Combination Sum II. LeetCode 39Combination Sum (Medium) [link] Note

The following basic-level SQL problems. LeetCode 1075Project Employees I (Easy) [link] SELECT p.project_id, ROUND(AVG(e.

Solution to LeetCode 17 Letter Combinations of a Phone Number, LeetCode 77 Combinations, and LeetCode 216 Combination Su

The following basic-level SQL problems. LeetCode 610Triangle Judgement (Easy) [link] Using CASE WHEN SELECT x, y, z,

The following basic-level SQL problems. LeetCode 577Employee Bonus (Easy) [link] SELECT e.name, b.bonus FROM Employee e