To keep your Oracle SQL Developer connection alive, you can use a keepalive extension that periodically sends a simple query to the database, preventing the connection from timing out. First ...

The Oracle SQL Developer tool can connect to databases other than Oracle, including MySQL, Microsoft SQL Server and DB2. The SQL development environment helps the programmer perform basic ...

Restart SQL Developer to complete the extension installation. If you click on the menu: "File"->"Show password" a window will appear that contains a table (with columns: connection name,db host, SID, ...