1. Learn
    2. /
  2. Courses
    3. /
  3. Improving Query Performance in SQL Server

Exercise

EXCEPT

EXCEPT does the opposite of INTERSECT. It is used to check if data, present in one table, is absent in another.

You want to know which countries have no recorded earthquakes. You can get this information by comparing the Nations table with the Earthquakes table.

Instructions

100 XP
  • Add the country code column from the Nations table.
  • Add the operator that compares the two queries.
  • Add the table with country codes to the right query.