Import Wallet on PDB in 19c Oracle Database

 SQL> alter session set container=TESTPDB;

Open the wallet

SQL> ADMINISTER KEY MANAGEMENT SET KEYSTORE OPEN IDENTIFIED BY "<password>";

Import the wallet

SQL> administer key management import encryption keys with secret "<password>" from '/d01/wallet/tde/testpdb.key' identified by "<password>" with backup;

Verify Wallet Status

SQL> select STATUS from V$ENCRYPTION_WALLET;

STATUS
OPEN