Problems’ guide
My Hackerrank account: https://www.hackerrank.com/profile/omar_esameldin11
After completing my study and practice of Hackerrank SQL problems, I've outlined a recommended approach for solving them, along with helpful tips and tutorials:
Keep in mind:
- If you find questions unclear and feel confused, know that many in the Hackerrank community share this sentiment due to how problems are sometimes explained.
- Engage in discussions to learn from others' solutions using your preferred SQL dialect.
- Solutions in this guide are sourced from various references, including discussions and my own solutions.
- Hackerrank may not be the easiest platform for beginners in query writing, as it often requires additional research. I aim to clarify essential concepts for each question to assist your understanding.
- Most of my notes are in MySQL
Review SQL
- Helpful playlists
- If you already familiar with the concepts explained in the above playlists you can skip them.
- If you want to apply real life SQL queries and want to review some database design concepts, here is a helpful playlist