Additional Notes
How would you explain a sequential scan in SQL in an interview?
Track: Java
Topic: SQL for Java Devs
Focus: Indexes
Java: Indexes
Answer
A full table scan without using indexes. Frame the concept in practical terms so you can explain it during interview discussion.
A sequential scan occurs when every row in a table is examined, typically when no index is used. For example, if you run `SELECT * FROM products WHERE price < 50` without an index on the 'price' column, the database checks each row's price. In Java, using indexes helps avoid sequential scans for better performance.
A sequential scan occurs when every row in a table is examined, typically when no index is used. For example, if you run `SELECT * FROM products WHERE price < 50` without an index on the 'price' column, the database checks each row's price. In Java, using indexes helps avoid sequential scans for better performance.
Topics: Indexes Java SQL for Java Devs