多项选择题

You issued the following command to drop the PRODUCTS table: SQL> DROP TABLE products; What is the implication of this command?（）

A.All data along with the table structure is deleted
B.The pending transaction in the session is committed
C.All indexes on the table will remain but they are invalidated
D.All views and synonyms will remain but they are invalidated
E.All data in the table are deleted but the table structure will remain

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单项选择题

Within a resource-plan definition, what differentiates a top-level plan from a subplan?（）

A. A subplan has the PLAN_SUB parameter value set to SUB
B. A top-level plan has the GROUP_OR_PLAN parameter set to the name of the subplan in the resource-plan definition
C. There is no difference in the resource-plan definition
D. A subplan always has the CPU_MTH parameter value set to RATIO
E. The string TOP_LEVEL is appended to the name of top-level resource plans

多项选择题

Which two statements are true regarding working with dates?（）

A.The default internal storage of dates is in the numeric format
B.The default internal storage of dates is in the character format
C.The RR date format automatically calculates the century from the SYSDATE function and does not allow the user to enter the century
D.The RR date format automatically calculates the century from the SYSDATE function but allows the user to enter the century if required

单项选择题

Evaluate the following query: SQL> SELECT TRUNC(ROUND(156.00,-1),-1)FROM DUAL; What would be the outcome?（）

A.16
B.100
C.160
D.200
E.150