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Question
If the SQL statementSELECT C1, C2, C3
FROM T4
WHERE C2 = 'Smith';
is frequently executed, which column(s) should be considered for indexing based only on the statement itself?
A) C1 only
B) C2 only
C) C3 only
D) C1 and C2
Answer
This answer is hidden. It contains 1 characters.
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