多项选择题

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 tablespacelevel logging attribute can be overridden by logging specifications at the table， index， materialized view， materialized view log， and partition levels.

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多项选择题InyourOracle10gdatabase，youhavescheduledajobtoupdatetheoptimizerstatisticsat05：00pmeveryFriday.Thejobhassuccessfullycompleted.Whichthreepiecesofinformationwouldyouchecktoconfirmthatthestatisticshavebeencollected？（）

A.average row size
B.last analyzed date
C.size of table in bytes
D.size of table in database blocks
E.number of free blocks in the free list
F.number of extents present in the table

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A.http：//145.33.230.186：5500/em
B.http：//www.145.33.230.186：5500/em
C.http：//tech1.us.oracle.com：5500/em
D.http：//test.145.33.230.186：5500/em
E.http：//test.tech1.us.oracle.com：5500
F.http：//www.tech1.us.oracle.com：5500/em
G.http：//test.tech1.us.oracle.com：5500/em

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C.write the current database metrics to a flat file and create an operating script to compare with future database statistics
D.write the current database metrics to a database table and create a procedure to compare with future database statistics
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E.size the SYSTEM tablespace appropriately
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A.audit trail
B.alert log file
C.user trace file
D.online trace file
E.background trace file
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