Student Advisor is one of the five questions in the HackerRank SQL (Basic) certification test. It looks like a copy of the other join questions, but it has two salary limits, one for each gender, and ...

Profitable Stocks is one of the five questions in the HackerRank SQL (Basic) certification test. It is short. The two things to get right are the comparison and the sort. There is one table of today’s ...

16 HackerRank problems on joins, CASE, subqueries and CTEs, pivoting, and window functions. These are the hardest of the precourse lists: most need two or more steps. Finish the 1B and 1C lists first.

The organizer's original README is kept in the repository as HACKERRANK_README.md (it is not part of code.zip). Every step in output.csv is generated by code from a table of observations extracted ...