Additional Notes
How would you explain a common mistake when using indexes in an interview?
Track: Java
Topic: SQL for Java Devs
Focus: Indexes
Java: Indexes
Answer
Indexing every column without need. Frame the concept in practical terms so you can explain it during interview discussion.
Over-indexing can degrade performance due to the write overhead. It's a common mistake to index all columns, thinking it will boost performance. However, in a Java e-commerce app, focus on indexing columns that are frequently searched or used in joins, like 'product_id' in an 'orders' table.
Over-indexing can degrade performance due to the write overhead. It's a common mistake to index all columns, thinking it will boost performance. However, in a Java e-commerce app, focus on indexing columns that are frequently searched or used in joins, like 'product_id' in an 'orders' table.
Topics: Indexes Java SQL for Java Devs