Quick Reference
The CASE keyword is used is to create different output based on various conditions.
The following will order the customers from the Customers table by city. However, if city is NULL, then it will order by country.
SELECT name, city, country
FROM Customers
ORDER BY
(CASE
WHEN city IS NULL THEN country
ELSE city
END);SQL Notes:
- Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup
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