Please help me with one question . Do you have a course on SQL and oracle?
We have multiple SQL courses.
Some of them are meant for data analysts/scientists; these are focused on querying databases and having an understanding of how databases work.
Some of them are meant for data engineers and are a lot more focused on creating and maintaining databases.
For the first type of course above, we use SQLite (not Oracle), but the kind of content we cover is pretty much universal across all SQL dialects, as we teach pure SQL.
For the second type of course, we use Postgres. In my honest opinion, this could still be very useful to you even if you just want Oracle, as the concepts are universal, just the implementations might differ across different databases.