FAQ: Aggregate Functions - Round


This community-built FAQ covers the “Round” exercise from the lesson “Aggregate Functions”.

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This exercise can be found in the following Codecademy content:

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Data Science

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FAQs on the exercise Round

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I still don’t understand why the numeral (2) is used to round to an average of two decimal places.

SELECT ROUND(price, 0)
FROM fake_apps;

The above example rounds to the nearest integer.

SELECT ROUND(price, 2)
FROM fake_apps;

The above example rounds to the nearest second decimal place.

ROUND(123.456, 2)    //  123.46



If the function takes in a column name, how does avg(prices) qualify as one? I thought avg(prices) returns a single value?

Can someone elaborate. Thanks