EDIT: Crashes often though.
And for a command-line client, clickhouse-client has been around since 2016.
I can’t think of another DB TUI tool as nice. I use it mainly with DuckDB, for which I believe it was originally written (although the web notebook UI that now ships with the DuckDB binary is also nice).
Slightly OT, but PyCharm / Datagrip always feels quite flaky with DuckDB. Thanks to Harlequin, I never needed to dig into it too deeply. I only wish that DuckDB supported writes while attached (in read-only mode) from another process! Although I understand there are good reasons for not doing so.