1z0-071 Oracle Database 12c SQL 第35题 DML

Q35. Which task can be performed by using a single Data Manipulation Language (DML) statement?

A. adding a column constraint when inserting a row into a table
B. adding a column with a default value when inserting a row into a table
C. removing all data only from one single column on which a unique constraint is defined
D. removing all data only from one single column on which a primary key constraint is defined

Correct Answer: C