PostgreSQL AVG Function
AVG
The AVG()
function returns the average value of a numeric column.
Example
Return the average price of all the products in the products table:
SELECT AVG(price)
FROM products;
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Note: NULL values are ignored.
With 2 Decimals
The above example returned the average price of all products, the result was
28.8663636363636364.
We can use the ::NUMERIC operator to round the average price to a number with 2 decimals:
Example
Return the average price of all the products, rounded to 2 decimals:
SELECT AVG(price)::NUMERIC(10,2)
FROM products;
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