DbSchemaCLI command-line client can connect to multiple databases, run queries on multiple databases, transfer data, execute scheduled tasks, monitor databases, and send alert emails, execute SQL reports and send the results over ftp or email. DbSchema is used also to run the Floating License Server.
DbSchemaCLI is part of the standard installation kit, is free, and supports all databases supported by DbSchema.
Use one client to connect to different databases, from different providers (PostgreSQL, MySql, SqlServer, Redshift, etc.). If the same table resides on multiple databases, you can query all of them at the same time. Also, you can monitor multiple databases with a single command (like CPU load, disk usage, locking, or replication).