LLMs coding performance is directly proportional to amount of stolen data for the learning process. That's why frontend folks are swearing by it and are forecasting our new god dominance in just a few years. That's because frontend code is literally out there mostly, just take it and compile into a dataset. Stuff like SQL DBs is not laying on every internet corner and is probably very underrepresented in the dataset, producing inferior performance. Same with rare or systems languages, like Rust for example, LLMs are also very bad with it.