easyMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: Refer to the exhibit
Exhibit
UPDATE Employees SET Salary = Salary + 500;
Refer to the exhibit. The following SQL statement is executed. The result message is: '0 rows affected'. What is the most likely reason?
⚠ Common exam trap
CompTIA often tests the distinction between a successful but zero-row operation and an error condition, trapping candidates who assume '0 rows affected' implies a missing WHERE clause or a nonexistent table.
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
✓
The table 'Employees' is empty
The SQL statement executed successfully (no syntax error) but affected zero rows because the target table 'Employees' is empty. An UPDATE statement modifies existing rows; if no rows exist, zero rows are affected regardless of the SET or WHERE clause. The message '0 rows affected' indicates the statement parsed and executed without error, but no data matched the condition (or there was no data to update).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The table 'Employees' does not exist
Why it's wrong here
Would cause an error message.
- ✗
The UPDATE privilege has been revoked
Why it's wrong here
Would result in a permission error.
- ✓
The table 'Employees' is empty
Why this is correct
No rows to update.
- ✗
The statement lacks a WHERE clause
Why it's wrong here
Lacking WHERE is valid and updates all rows.
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