RANK versus DENSE_RANK in SQL
SQL interview exercise on Window Functions, difficulty 2 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Rank every employee by salary, highest first, so that ties share a rank and the next rank follows without a gap: 1, 2, 2, 3. Columns: name, salary, salary_rank. Sorted by salary_rank, then name.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.