MIN, MAX and AVG
Along with summing and counting, you'll frequently need to find the minimum, maximum, and average of column values. Thankfully, T-SQL has functions you can use to make the task easier!
Deze oefening maakt deel uit van de cursus
Introduction to SQL Server
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
-- Find the minimum number of affected customers
SELECT
___(affected_customers) AS ___
FROM
grid
-- Only retrieve rows where demand_loss_mw has a value
WHERE
___ ___ ___ NULL;