$ duckdb -ui
can have multiple databases including in memory database attached. Can explore the databases using Table summary, the notebooks are useful in organizing work into notebooks. SQL is the language of the notebooks like [[python]] is for [[jupyter]] notebooks. The notebook cells support syntax highlighting and autocompletion.
The results can be visualized using the column explorer, which shows the summary of the results. It is "type aware", and thus can visulize things like percentiles, median etc.
Interestingly, the the UI extension is all written in [[cpp]] - https://github.com/duckdb/duckdb-ui