Additional Notes
How can you tell if an index is used in a query?
Track: Java
Topic: SQL for Java Devs
Focus: Indexes
Java: Indexes
Answer
By analyzing the execution plan with EXPLAIN.
The execution plan details if and how indexes are used in a query. In a Java application, running `EXPLAIN SELECT * FROM orders WHERE customer_id =?` shows the query's execution steps, indicating index usage. If the plan mentions 'index scan', it confirms the use of an index, optimizing the query.
The execution plan details if and how indexes are used in a query. In a Java application, running `EXPLAIN SELECT * FROM orders WHERE customer_id =?` shows the query's execution steps, indicating index usage. If the plan mentions 'index scan', it confirms the use of an index, optimizing the query.
Topics: Indexes Java SQL for Java Devs