[Solved] Why can having too many indexes on a table hurt overall database performance? — Ans: Because each insert, update, or delete must update all indexes, slowing writes | SQL

SQL - Indexes and Query Performance

Why can having too many indexes on a table hurt overall database performance?

ABecause indexes cause syntax errors in queries

BBecause indexes prevent queries from using joins

CBecause each insert, update, or delete must update all indexes, slowing writes

DBecause indexes increase the size of the database beyond limits

Step-by-Step Solution

Solution:

Step 1: Understand index maintenance cost
Each data modification (insert, update, delete) requires updating all related indexes, which slows down write operations.
Step 2: Evaluate other options
Indexes do not cause syntax errors, do not prevent joins, and do not increase database size beyond limits in a harmful way.
Final Answer:
Because each insert, update, or delete must update all indexes, slowing writes -> Option C
Quick Check:
Too many indexes slow writes due to maintenance = B [OK]

Quick Trick: Too many indexes slow down data modifications [OK]

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