PDB Pluggable Database是12c中扛鼎的一个新特性， 但是对于CDB中的PDB，默认启动CDB时不会将所有的PDB带起来，这样我们就需要手动alter pluggable database ALL OPEN;     例如： SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> SQL> startup ; ORACLE instance started. Total System Global Area 1419685888 bytes Fixed Size 2288344 bytes Variable Size 536872232 bytes Database Buffers 872415232 bytes Redo Buffers 8110080 bytes Database mounted. Database opened. … Continue reading 【12c新特性】12c中如何自动启动PDB Pluggable Database