Multiple choice technology databases

Assuming the date and time is 09/09/2009 09:09:09, what value will the following statement return SELECT TO_CHAR(TRUNC(SYSDATE),'MM/DD/YYYY HH24:MI:SS') FROM dual;

  1. 09/09/2009 00:00:00

  2. 09/09/2009 09:09:09AM

  3. 09/09/2009

  4. 09/09/2009 09:09:09

  5. None of the above.
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A Correct answer
Explanation

The given statement is:

SELECT TO_CHAR(TRUNC(SYSDATE),'MM/DD/YYYY HH24:MI:SS') FROM dual;

Let's break down the statement:

  1. TRUNC(SYSDATE): This truncates the current date and time to the nearest day, setting the time component to 00:00:00.

  2. TO_CHAR(TRUNC(SYSDATE),'MM/DD/YYYY HH24:MI:SS'): This converts the truncated date and time to a string format with the specified format mask.

Considering the given date and time is 09/09/2009 09:09:09, when we truncate this date and time, the time component will be set to 00:00:00, resulting in 09/09/2009 00:00:00.

Therefore, the statement will return "09/09/2009 00:00:00".

The correct answer is A) 09/09/2009 00:00:00.

AI explanation

TRUNC(SYSDATE) strips off the time portion of the current date, effectively setting the time to midnight (00:00:00) while keeping the date unchanged. TO_CHAR then formats that truncated value using the given mask, so the output shows the correct date with all-zero time components, not the actual current time.

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