What is the difference between a hash join and a nested loop join?

SQL Fundamentals Hard

SQL Fundamentals — Hard

What is the difference between a hash join and a nested loop join?

Key points

  • Hash join creates a hash table for efficient probing, while nested loop join iterates rows.
  • Hash join is best for large unsorted tables, while nested loop join is suitable for small, indexed inner tables.
  • Hash join and nested loop join have different performance characteristics based on table sizes.

Ready to go further?

Start full exam Practice more questions

Related questions