单项选择题
A.set the SESSIONS to 1 in the parameter file
B.grant SINGLE SESSION privilege to all of the users
C.set the SESSIONS_PER_USER to 1 in the users’ profile
D.grant RESTRICTED SESSION privilege to all of the database users
E.create a role with SINGLE SESSION privilege and assign the role to the users
单项选择题 You are using flat files as the data source for one of your data warehousing applications. You plan to move the data from the flat file structures to an Oracle database to optimize the application performance. In your database you have clustered tables. While migrating the data， you want to have minimal impact on the database performance and optimize the data load operation. Which method would you use to load data into Oracle database？（）
单项选择题 Wheredoyoufindinformationaboutamissingredologfile？（）
单项选择题 YourdatabaseisintheNOARCHIVELOGmode.Sincelastnight’sofflinebackup，thelogsingroup1havebeenwrittentotwice.Thismorning，theSYSTEMdatafilehasbecomecorrupted.Uptowhatpointcanitberecovered？（）