DA0-002 Data Acquisition and Preparation Practice Question
A data analyst wants to extract the year from a date column 'order_date' in a SQL database. Which function should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
YEAR(order_date)
The YEAR() function extracts the year from a date. DATEADD adds intervals, DATEDIFF calculates differences, GETDATE() returns current date.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
YEAR(order_date)
Why this is correct
Returns the year portion of the date.
- ✗
DATEADD(year, order_date, 0)
Why it's wrong here
Adds year interval, not extraction.
- ✗
DATEDIFF(year, order_date, GETDATE())
Why it's wrong here
Returns difference in years between two dates.
- ✗
GETDATE()
Why it's wrong here
Returns current date and time.
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