Which two operations can be performed on an external table（）A、Create a view on the table.B、Create an index on the table.C、Create a synonym on the table.D、Add a virtual column to the table.E、Update the table using the UPDATE statement.F、Delete rows in the

题目

Which two operations can be performed on an external table（）

A、Create a view on the table.
B、Create an index on the table.
C、Create a synonym on the table.
D、Add a virtual column to the table.
E、Update the table using the UPDATE statement.
F、Delete rows in the table using the DELETE command.

参考答案和解析

正确答案:A,C

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