I have created a terminal-based client for opening RDBMS and local files. Currently, it supports only basic features, but it should function as a viewer.

- Supports MySQL, PostgreSQL, SQLite3, and SQL Server as RDBMS.

- Supports CSV, TSV, and LTSV as local files.

- Executes SQL queries and displays results (with some query execution limitations)

- SQL query history.

- Saves RDBMS connection information.

- Provides over 10 color schemes

If many people are interested in this tool, I plan to continue its development! Happy hacking!