/SQL/How to use aggregate functions in sql

How to use aggregate functions in sql

This is the example.Aggregate function is AVG.production.products is the table.

SELECT
    AVG(list_price) avg_product_price
FROM
    production.products;

Source: sqlservertutorial.net

Aggregate function in sql

• Single Row Functions:(Lower, Upper, Substr, Length)
function that will run for each row and 
return value for each row.

Multiple Row Functions (Group functions, Aggregate functions):
(Count, MIN , MAX, AVG, SUM)
will run for multiple rows and return a single value

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