A.when the tablespace is online
B.when the tablespace has segments with data in it
C.when the tablespace is a default permanent tablespace for the database
D.when the tablespace contains a table that is currently being used by transactions
E.when the tablespace contains undo data that is needed to rollback an uncommitted transaction来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/17013648/viewspace-1224825/ ,如需转载,请注明出处,否则将追究法律责任。