Kursinhalt
SQL Basics
SQL Basics
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$, for example. It would be great if we could round numbers to some digits.
Surely it's also implemented into SQL! To round number to n decimal places use ROUND(column_name, n) function. For example, from our audi_cars dataset let's calculate the average price of TT model cars with mileage less than 3000 and round the result to 0 decimals (so it will be an integer).
SELECT ROUND(AVG(price), 0) FROM audi_cars WHERE model = 'TT' AND mileage < 3000
That's more representative!
Swipe to start coding
From the audi_cars table calculate the average price for Petrol cars (column fueltype) with Semi-Auto transmission (column transmission). Round the result to 2 digits after the comma.
Lösung
Wechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwendenDanke für Ihr Feedback!
ROUNDing
In the last chapter, you solved the task and received a number with many digits after the decimal place. This is surely precise, but not representative, as there is no way to pay 0.002$, 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).
SELECT 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.
Lösung
Wechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwendenDanke für Ihr Feedback!
Wechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwenden