245.Which statements are true regarding system-partitioned tables? (Choose all that apply.)
A. Only a single partitioning key column can be specified.
B. All DML statements must use partition-extended syntax.
C. The same physical attributes must be specified for each partition.
D. Unique local indexes cannot be created on a system-partitioned table.
E. Traditional partition pruning and partitionwise joins are not supported on these tables.
Answer: DE


参考：http://blog.csdn.net/rlhua/article/details/17008263
         http://docs.oracle.com/cd/E11882_01/appdev.112/e10765/dom_idx.htm#ADDCI4490