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Lära ROUNDing | Aggregating
SQL Basics
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Kursinnehåll

SQL Basics

SQL Basics

1. Selecting
2. Filtering
3. Aggregating
4. Sorting
5. Grouping
6. Practicing

book
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).

123
SELECT ROUND(AVG(price), 0) FROM audi_cars WHERE model = 'TT' AND mileage < 3000
copy

That's more representative!

Uppgift

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.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 4
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book
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).

123
SELECT ROUND(AVG(price), 0) FROM audi_cars WHERE model = 'TT' AND mileage < 3000
copy

That's more representative!

Uppgift

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.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 4
Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Vi beklagar att något gick fel. Vad hände?
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