The following are the most important guidelines regarding Data Pump compatibility:
1. The compatibility level of the Data Pump dumpfile set is determined by the compatibility level of the source database.
2. Use the Export Data Pump client (expdp) that matches the version of the source database (up to one major version lower expdp client can be used, but this is not recommended).
3. Use the Import Data Pump client (impdp) that matches the version of the target database (up to one major version lower impdp client can be used, but this is not recommended).
4. Use the Export Data Pump parameter VERSION in case the target database has a lower compatibility level than the source database.
5. Transferring data over a database link is supported even if the compatibility level of the (remote) source database differs from the (local) connected database (up to one major version difference is supported).
6. Import Data Pump can always read Export Data Pump dumpfile sets created by older versions of the database.
7. Export dumpfiles created with the Export Data Pump client (expdp) cannot be read by the original Import client (imp).
8. Export dumpfiles created with the original Export client (exp) cannot be read by the Import Data Pump client (impdp).
2. Use the Export Data Pump client (expdp) that matches the version of the source database (up to one major version lower expdp client can be used, but this is not recommended).
3. Use the Import Data Pump client (impdp) that matches the version of the target database (up to one major version lower impdp client can be used, but this is not recommended).
4. Use the Export Data Pump parameter VERSION in case the target database has a lower compatibility level than the source database.
5. Transferring data over a database link is supported even if the compatibility level of the (remote) source database differs from the (local) connected database (up to one major version difference is supported).
6. Import Data Pump can always read Export Data Pump dumpfile sets created by older versions of the database.
7. Export dumpfiles created with the Export Data Pump client (expdp) cannot be read by the original Import client (imp).
8. Export dumpfiles created with the original Export client (exp) cannot be read by the Import Data Pump client (impdp).
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