The COALESCE() function
The GREATEST() & LEAST() functions
The NULLIF() function
Instruction
Good! Let's do another exercise to practice the use of the NULLIF() function.
Exercise
Show the name of each product and the ratio column calculated in the following way: the price of each product in relation to its shipping_cost in percent, rounded to an integer value (e.g., 31).
If the shipping cost is 0.00, show NULL instead.
Stuck? Here's a hint!
Use the ROUND(x) function to get the rounded value.
