Difficulty: Medium-High Recommended for: Those who only want to practice SQLD problems! Great for studying for the SQLD exam! Even after going through concept lectures separately 3 times, I felt stuck on problem-solving, so I'm taking this course to learn how to apply concepts and solve problems. Especially since other problem-solving courses sometimes lack SQL practice, this course having it made it easier to understand. Even when trying to solve the "Yellow Book" problems repeatedly, they are quite difficult, but I'm continuously practicing them while listening to the lecture. I really want to pass this time! + 2025.05.31 Exam Review: Problems similar to those in the "Yellow Book" problem set were included in the exam. So, if you're short on time, I recommend at least solving the problems for Subject 2 before going. Subject 2 appears a lot.