Multiple choice technology databases

What best describes the relationship between indexes and SQL performance?

  1. Indexes are only used in special cases

  2. Indexes are used to make table storage more efficient

  3. Indexes rarely make a difference in SQL performance

  4. Indexes exist solely to improve query speed
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Indexes are database structures created specifically to accelerate data retrieval operations. They provide fast lookup paths to rows without scanning entire tables. Option A is incorrect - indexes are commonly used. Option B is wrong - indexes add overhead to storage. Option C is false - indexes frequently dramatically improve query performance.

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