SQL for Java Devs · interview question
Why might you avoid using an index on a column with a high number of unique values?
Multiple choiceMediumchapter-8-curatedpremiumsql-for-java-devsindexes
Answer and explanation
Correct answer
B. It increases the size of the database
Why
Indexes on columns with a high number of unique values may not provide significant performance benefits and can increase the database size, leading to potentially higher storage costs and maintenance complexity.
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