In the context of Entity Framework, how can composite indexes affect query performance?
- They are only used for sorting purposes
- They can degrade query performance by increasing index maintenance overhead
- They can improve query execution by allowing efficient retrieval of data
- They have no impact on query performance
Composite indexes in Entity Framework can potentially degrade query performance by increasing index maintenance overhead. When multiple columns are indexed together, the index needs to be updated whenever any of the indexed columns are modified, leading to increased maintenance costs. While composite indexes can improve query performance for specific queries, they can also introduce overhead in scenarios involving frequent data modifications.
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