多选题Which two statements regarding the LOGGING clause of the CREATE TABLESPACE... statement are correct？（）AThis clause is not valid for a temporary or undo tablespace.BIf the tablespace is in the NOLOGGING mode，no operation on the tablespace will generate redo.CThe tablespace will be in the NOLOGGING mode by default，if not specified while creating a tablespace.DThe tablespace-level logging attribute can be overridden by logging specifications at the table，index， materialized view，materialized view log，and partition levels.
多选题
Which two statements regarding the LOGGING clause of the CREATE TABLESPACE... statement are correct？（）
A
This clause is not valid for a temporary or undo tablespace.
B
If the tablespace is in the NOLOGGING mode，no operation on the tablespace will generate redo.
C
The tablespace will be in the NOLOGGING mode by default，if not specified while creating a tablespace.
D
The tablespace-level logging attribute can be overridden by logging specifications at the table，index， materialized view，materialized view log，and partition levels.
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