{2 マルチテナント}コンテナ切り替えを実行

 

https://docs.oracle.com/cd/F19136_01/multi/administering-a-cdb-with-sql-plus.html#GUID-90C01374-20C9-41A2-AC6D-808F78AA51D3

     ルート
     シード
     PDB

show pdbs;
show con_name
alter session set container=pdb$seed;
show con_name
alter session set container=pdb11;
show con_name
alter session set container=cdb$root;
show con_name