I want a SQL query playground that remembers context across my projects

I jump between 4 different databases for different side projects and every time i open TablePlus or whatever i have to remember the schema, the join patterns, which table has what. AI chat in the cursor era is great but it doesn't know MY schemas. i want something that indexes my db schemas, learns my query patterns over time, and lets me just say "show me users who signed up last week but never created a project" and it writes the right SQL for the right database. claude code style but for data.