单项选择题
A. when you want the data to be returned automatically in chronological order
B. if the application uses queries joining tables only occasionally
C. if the queries against the clustered table use the equality operator （=） to retrieve the desired row
D. if the full table scan is executed often on only one of the clustered tables
单项选择题 Theperformanceofyourdatabaseisaffectedbythepresenceoftwologmembersineachonlineredologgroupandtheplacementofredologmembersofagrouponthesamedisk.Youdecidetoplacetheredologmembersofagrouponseparatedisks.Whichviewwillyouquerytofindthenameandlocationofalltheonlineredologmembers？（）
单项选择题 You executed the following code： SQL> CERATE TABLE COUNTRY （COUNTRY_ID CHAR（2） CONSTRAINT COUNTRY_ID_nn NOT NULL， COUNTRY_NAME VARCHAR2（20）， CURRENCY_NAME VARCHAR2（20）， CONSTRAINT COUNTRY_ID_PK PRIMARY KEY （COUNTRY_ID）） ORGANIZATION INDEX； Which types of tables will be created automatically？（）
单项选择题 Youarecreatingajobclass.Youwantaccesstothedetailedinformationforalltherunsofeachjobintheclassandeveryoperationperformedoneveryjobintheclass.WhichsettingwillyouusefortheLOGGING_LEVELparameter？（）