第 40 题 (多选题)： You need to calculate the number of days from 1st January 2019 until toda. Dates are stored in the default format of DD-MON-RR.Which two queries give the required output.

A. SELECT ROUND(SYSDATE-TO_DATE('01/JANUARY/2019'))FROM DUAL . B. SELECT SYSDATE-TO_DATE('01-JANUARY-2019') FROM DUAL; . C. SELECT ROUND(SYSDATE-'01-JAN-2019') FROM DUAL;. D. SELECT TO_DATE(SYSDATE, DD/MONTH/YYYY")-'01/JANUARY/2019' FROM DUALI E. SELECT TO_CHAR(SYSDATE, DD-MON-YYYY)-'01-JAN-2019' FROM DUAL; 显示答案