We are always asked by clients what version of GoldenGate supports what version of Oracle databases ? or whether certain Oracle database version is supported by certain version of GoldenGate ?
The easy way is going to Oracle Support website -> Certifications.
Use GoldenGate Oracle GoldenGate 12.2.0.1.0 as an example, it supports Oracle database version back to 11.2.0.1.
For GoldenGate 19.1.0.0.0, it supports the following Oracle database versions: 19c,18c,12.2.0.1,12.1.0.2, 12.1.0.1 and 11.2.0.4.

For GoldenGate 21.3.0.0.0, it only supports Oracle database 21c, 19c, 12.1.0.2 and 11.2.0.4.
For GoldenGate 21.3.0.0.1, it only supports Oracle database 19c and 21c.
