单项选择题

EMPDET is an external table containing the columns EMPNO and ENAME.  
Which command would work in relation to the EMPDET table？（）

A.A
B.B
C.C
D.D

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多项选择题
WhichthreepossiblevaluescanbesetfortheTIME_ZONEsessionparameterbyusingtheALTERSESSIONcommand？（）

A. os
B. local
C. -8：00
D. dbtimezone Li
E. Australia
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
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