OCP-1Z0-051-題目解析-第19題
SELECT INTERVAL '300' MONTH,
INTERVAL '54-2' YEAR TO MONTH,
INTERVAL '11:12:10.1234567' HOUR TO SECOND
FROM dual;
What is the correct output of the above query?
A. +25-00 , +54-02, +00 11:12:10.123457
B. +00-300, +54-02, +00 11:12:10.123457
C. +25-00 , +00-650, +00 11:12:10.123457
D. +00-300 , +00-650, +00 11:12:10.123457
Answer: A
題目解析:INTERVAL是一個把相關字串轉換為時間長度的函式。
INTERVAL '300' MONTH 表示25年0個月(12*25=300), 即+25-00
INTERVAL '54-2' YEAR TO MONTH, 表示54年2個月,即+54-02
INTERVAL '11:12:10.1234567' HOUR TO SECOND 表示0天11小時12分鐘10秒1234567毫秒,即 +00 11:12:10.123457
所以答案選A
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