OCP-1Z0-051-題目解析-第19題

阿新 • • 發佈：2019-01-11

19. Evaluate the following query:

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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19. Evaluate the following query: SELECT INTERVAL '300' MONTH, INTERVAL '54-2' YEAR TO MONTH, INTERVAL '11:12:10.1234567' HOUR TO SECON

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