Free practice · ordering · medium

Practice

Build a subquery step by step

Put the subquery workflow in a reliable order.

Arrange in the correct order
  1. 1. Use it in the matching outer comparison
  2. 2. Confirm whether its result is scalar or a one-column list
  3. 3. Run and validate the inner query alone
  4. 4. Define the value or list the inner query must return