The image shows a public Internet region, an on-premises region, and an OCI region that contains a VNC with public and private subnets, which connect to each other.

The public Internet region contains web browsers that connect, via the Internet, to a OCI tools such as SQL Worksheet and Cloud Shell, which can be used to execute SQL on the high-availability Oracle MySQL Database Service systems in the private subnet.

The on-premises region contains MySQL tools such as MySQL Workbench and VS Code connect to the OCI region via the Internet to OCI Bastion Service to the high-availability Oracle MySQL Database Service systems in the private subnet.