升級到Oracle DB 12c之前應該考慮的因素：DB 12c中EM Express 12c的功能減少，oracle12c

升級到Oracle DB 12c之前應該考慮的因素：DB 12c中EM Express 12c的功能減少，oracle12c

升級到Oracle DB 12c之前應該考慮的因素：DB 12c中EM Express 12c的功能減少

若是使用了DB Control中的notifications， perform a task 等等的功能，而在  EM Express 12c 中是沒有這些功能的，因此，需要額外考慮這些問題。建議是使用Oracle Enterprise Manager Cloud Control (Cloud Control）Cloud Control provides you with complete monitoring across the Oracle technology stack and non-Oracle components. You must install Cloud Control separately after installing Oracle Database 12c , No additional license required .

參考文章：

EM Express 12c Database Administration Page FAQ (Doc ID 1601454.1)