数字符号的种类不包括()
A、西文半角
B、西文全角
C、罗马数字
D、中文番号
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删除视图salary的命令是( )。
A、DROP VIEW salary
B、DROP salary VIEW
C、DELECT salary
D、DELECT salary VIEW
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Which modifier is used to change listener parameters in the Listener Control utility environment?()
A、SET
B、ALTER
C、CHANGE
D、UPDATE
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Which two file types must be included in a closed database backup taken with operating system commands?()
Adata files
Bcontrol file
Cpassword file
Donline redo log files
Einitialization parameter file
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设有如下程序:程序运行后单击命令按钮Command1,输出结果为( )。
A、105 7
B、90 5
C、15 7
D、15 5
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Which three attributes of the LOG_ARCHIVE_DEST_n initialization parameter control the data availability mode of a Data Guard standby database? ()
ASYNC or ASYNC to identify the network transmission mode.
BLGWR or ARCH to identify the primary database process responsible for sending redo information to the standby.
CAFFIRM or NOAFFIRM to control whether log archiving disk write operations are to be performed synchronously or asynchronously.
DPROTECTED or UNPROTECTED to control the degree of divergence and data loss at the standby database.