Lệnh start database pdbs

 alter pluggable database emr open;

or
alter pluggable database all open;
or
alter session set container=emr;
>startup
alter session set container=CDB$ROOT;

Đóng

alter pluggable database all close;

Related posts

How to deal with ORA-00020: maximum number of processes (%s) exceeded

How to resolve ORA-01111 ORA-01110 ORA-01157 in a physical standby database 

Công cụ tự động khai báo datafile – Oracle