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What is the main impact of having many indexes on a table when performing INSERT operations?

easy📝 Conceptual Q11 of 15
SQL - Indexes and Query Performance
What is the main impact of having many indexes on a table when performing INSERT operations?
AInserts become slower because each index must be updated.
BInserts become faster because indexes help locate where to insert.
CInserts are unaffected by indexes.
DInserts cause indexes to be deleted automatically.
Step-by-Step Solution
Solution:

  1. Step 1: Understand how indexes affect inserts

    When inserting a new row, the database must update all indexes related to that table to keep them accurate.

  2. Step 2: Analyze the effect on performance

    Updating multiple indexes adds overhead, making inserts slower as more indexes exist.

  3. Final Answer:

    Inserts become slower because each index must be updated. -> Option A

  4. Quick Check:

    More indexes = slower inserts [OK]
Quick Trick: More indexes slow inserts due to extra updates [OK]
Common Mistakes:
  • Thinking indexes speed up inserts
  • Believing inserts ignore indexes
  • Assuming indexes get deleted on insert

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