Which two are the prerequisites to enable Flashback Data Archive? (Choose two.)A. Database must be running in archivelog mode.B. Automatic undo manage ...
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其他好文 时间:
2017-11-16 15:24:09
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144
A database is running in ARCHIVELOG mode and regular backups are performed. A user receives the following error message: Which is the recommended sequ ...
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其他好文 时间:
2017-11-16 15:24:01
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142
XMAL代码如下: <Image Name="ImageToSave" Source="Images/pic_bg.png" Grid.RowSpan="3" Grid.ColumnSpan="3" ></Image> C#代码如下: SaveFileDialog sfd = new SaveFil ...
一、显示和设置selinux [root@localhost ~]# vim /etc/sysconfig/selinux //强制模式 许可模式 禁用模式 [root@localhost ~]# getenforce //查看当前SElinux的状态 [root@localhost ~]# set ...
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系统相关 时间:
2017-11-15 21:48:25
阅读次数:
147
canvas一样可以使用图形变换。 位移,translate(x, y); 旋转:retate(deg); 缩放:scale(sx,sy); 但这个过程有个陷阱,如 效果如下: 可以发现,translate的数据叠加了。所以在绘制过程中应该使用save()和restore(); 效果回复正常。 ...
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其他好文 时间:
2017-11-14 19:36:38
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129
Which of the following are correct about block media recovery? (Choose all that apply.) A. Physical and logical block corruption is recorded automatic ...
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其他好文 时间:
2017-11-13 20:05:04
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192
今天数据群有人反应网站不能正常打开,经检查Oracle数据库远程连不上,提示信息:ORA-00257: archiver error. Connect internal only, until freed。可能是archivelog满了。以前学习SQL只关注CRUD,对日志了解甚少,此次宕机虽然对生 ...
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数据库 时间:
2017-11-11 23:48:49
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390
If a backup is expired, which of the following is true?A. It can never be used for a restore/recover operation.B. Oracle will remove the backup set pi ...
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其他好文 时间:
2017-11-10 20:35:36
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338
Why would you execute the report obsolete command?A. To list all backups that were no longer available for restore operationsB. To list all backups th ...
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其他好文 时间:
2017-11-10 20:33:05
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218
Which of the following does the recover command not do? A. Restore archived redo logs.B. Apply archived redo logs.C. Restore incremental backups.D. Ap ...
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其他好文 时间:
2017-11-10 16:54:08
阅读次数:
168