Which three possible values can be set for the TIME_ZONE session parameter by using the ALTER SESSION command？ （）

单项选择题The details of the order ID， order date， order total， and customer ID are obtained from the ORDERS table. If the order value is more than 30000， the details have to be added to the LARGEjDRDERS table. The order ID， order date， and order total should be added to the ORDERJHISTORY table， and order ID and customer ID should be added to the CUSTJHISTORY table.   Which multitable INSERT statement would you use？ （）

A. Pivoting INSERT
B. Unconditional INSERT
C. Conditional ALL INSERT
D. Conditional FIRST INSERT

单项选择题View the Exhibit and examine the details of the EMPLOYEES table.  The query was written to format the PHONE_NUMBER for the employees.   Which option would be the correct format in the output？（）

A. xxx-xxx-xxxx
B. （xxx） xxxxxxx
C. （xxx） xxx-xxxx
D. xxx-（xxx）-xxxx

单项选择题View the Exhibit and examine the structure of the ORDERS table. Which task would require subqueries？  （）

A. displaying the total order value for sales representatives 161 and 163
B. displaying the order total for sales representative 161 in the year 1999
C. displaying the number of orders that have order mode online and order date in 1999
D. displaying the number of orders whose order total is more than the average order total for all online orders

多项选择题Whichstatementsarecorrectregardingindexes？（）

A. When a table is dropped， the corresponding indexes are automatically dropped.
B. For each DML operation performed， the corresponding indexes are automatically updated.
C. Indexes should be created on columns that are frequently referenced as part of an expression.
D. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a uniqueindex.

单项选择题Evaluate the following SQL statements that are issued in the given order：  What would be the status of the foreign key EMP_MGR_FK？（）

A. It would be automatically enabled and deferred.
B. It would be automatically enabled and immediate.
C. It would remain disabled and has to be enabled manually using the ALTER TABLE command.
D. It would remain disabled and can be enabled only by dropping the foreign key constraint and re-creating it.