Choose the best answer.

Examine this query:

SELECT TRUNC (ROUND(156.00,-2),-1) FROM DUAL;

What is the result?

A) 16

B) 160

C) 150

D) 200

E) 100

Answer：D

 

(解析：关键就是 round 函数，0 是小数点左边第一位，以此类推。)