【多选题】Which two statements are true regarding undo tablespaces? (Choose two.)
A.
An undo tablespace is automatically created if the UNDO TABLESPACE parameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up
B.
Undo segments automatically grow and shrink as needed. acting as circular storage buffer for their assigned transactions
C.
The UNDO TABLESPACE parameter is valid in both automatic and manual undo management
D.
The database can have more than one undo tablespace
【单选题】数据库CAT有两个还原表空间:undo_cat1和undo_cat2。实例目前正在使用的还原表空间是undo_cat1并使用了如下的SQL语句:
A.
为什么还原表空间undo_cat1进入了挂起脱机模式还原表空间undo_cat2还没有激活
C.
ALTER SYSTEM SET UNDO_TABLESPACE没有成功
D.
新的事务既可以使用undo_cat1还原表空间,也可以使用undo_cat2还原表空间
【单选题】UNDO 数据的自动管理方式下( )。
A.
将使用 SYSTEM 表空间的撤销段存储还原数据。
D.
无需 UNDO 表空间,全部由 Oracle 自动管理。
【单选题】Among all the trade terms in INCOTERMS 2020, ( ) imposes the minimum obligation and cost to the seller.
【多选题】Which two statements are true regarding undo tablespaces?(Choose two)
A.
The database can have more than one undo tablespace
B.
The UNDO TABLESPACE parameter is valid in both automatic and manual undo management
C.
Undo segments automatically grow and shrink as needed, acting as circular storage buffer for their assigned transactions
D.
An undo tablespace is automatically created if the UNDO_TABLESPACE parameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up
【单选题】Among all the trade terms in INCOTERMS 2020, ( ) imposes the minimum obligation and cost to the buyer.
【单选题】观察图 14 所示的图像状态,下列说法中错误的是:( )
C.
在工具选项条的“模式”下拉列表中选择不同的选项,变形的程度也各不相同
【判断题】桥梁是保证车辆行驶宣泄水流及船只同行的构筑物。