Instruction
Good! The other table we'll need in this part is customers. We've used it before, but this time we'll especially need the last_order_date column.
Exercise
Count the number of customers who placed their most recent order in 2018. Name the column: count_2018_customers.
Stuck? Here's a hint!
Use the following WHERE clause:
WHERE last_order_date >= '2018-01-01' AND last_order_date < '2019-01-01'




