ROUNDing
In the last chapter, you solved the task and received a number with many digits after the decimal place. This is surely precise, but not representative, as there is no way to pay 0.002$, for example. It would be great if we could round numbers to some digits.
Surely it's also implemented into SQL! To round number to n
decimal places use ROUND(column_name, n)
function. For example, from our audi_cars
dataset let's calculate the average price of TT model cars with mileage less than 3000 and round the result to 0 decimals (so it will be an integer).
123SELECT ROUND(AVG(price), 0) FROM audi_cars WHERE model = 'TT' AND mileage < 3000
That's more representative!
Swipe to start coding
From the audi_cars
table calculate the average price for Petrol cars (column fueltype
) with Semi-Auto transmission (column transmission
). Round the result to 2 digits after the comma.
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ROUNDing
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In the last chapter, you solved the task and received a number with many digits after the decimal place. This is surely precise, but not representative, as there is no way to pay 0.002$, for example. It would be great if we could round numbers to some digits.
Surely it's also implemented into SQL! To round number to n
decimal places use ROUND(column_name, n)
function. For example, from our audi_cars
dataset let's calculate the average price of TT model cars with mileage less than 3000 and round the result to 0 decimals (so it will be an integer).
123SELECT ROUND(AVG(price), 0) FROM audi_cars WHERE model = 'TT' AND mileage < 3000
That's more representative!
Swipe to start coding
From the audi_cars
table calculate the average price for Petrol cars (column fueltype
) with Semi-Auto transmission (column transmission
). Round the result to 2 digits after the comma.
Рішення
Дякуємо за ваш відгук!
Awesome!
Completion rate improved to 2.63single