SQL> alter pluggable database PDBEPPS open;
 Pluggable database altered.
 SQL> select con_id, dbid, guid, name , open_mode from v$pdbs;    
 CON_ID      DBID GUID                            NAME                          OPEN_MODE
 ---------- ---------- -------------------------------- ------------------------------ ----------        
2 4071321146 E89E8DA2866E3157E043DE07A8C09238 PDB$SEED  READ ONLY        3 1930201447 E89E9418B882350CE043DE07A8C092B6 PDBEPPS        READ WRITE
方式2:
SQL> alter session set container=PDBEPPS;
 Session altered.
 SQL> startupPluggable Database opened.
 SQL>

