Supported range of DB connectors

Question

Which versions of DB can "Oracle 19c connector" and "SQL Server 2019 connector" connect to?
If the connectors support versions other than Oracle 19c and SQL Server 2019, please tell us which versions they can connect to.

Also, which versions of JDBC drivers are available for Oracle and SQL Server?

Answer

Not only Oracle and SQL Server, the dedicated connectors basically only support the version whose indicated in the connector name.
Connecting to other versions is not restricted, but operation is not ensured.

The following versions of JDBC drivers are available as examples.

■Oracle
　Oracle JDBC Driver 19

■SQL Server
　Microsoft JDBC Driver 8.4 for SQL Server

■MySQL
　MySQL Connector/J 8.0

■DB2
　IBM Data Server Driver for JDBC and SQLJ (for V11.1)