I recommend watching this only after you have a solid grasp of the concepts. The instructor proceeds with the lecture assuming that students already have a general understanding of the material. The conceptual explanations are very brief, so they aren't particularly helpful for solving the problems. I strongly suggest taking a concept-focused course before starting this one. There are quite a few tricky problems. I initially thought this was a "cram course," but I ended up struggling and am now studying by using GPT as a guide. Anyway, please keep this in mind when purchasing the course, and I wish everyone good luck with their SQLD results.