QUESTION NO: 18
Evaluate the following SQL statements:
DELETE FROM sales;
There are no other uncommitted transactions on the SALES table.
Which statement is true about the DELETE statement?
A. It removes all the rows as well as the structure of the table
B. It removes all the rows in the table and deleted rows cannot be rolled back
C. It removes all the rows in the table and deleted rows can be rolled back
D. It would not remove the rows if the table has a primary key
Answer: C
答案解析：
参考：167：http://blog.csdn.net/rlhua/article/details/12887667
Explanation: