How to round an average to 2 decimal places in PostgreSQL?

Question

I am using PostgreSQL via the Ruby gem \'sequel\'.

I\'m trying to round to two decimal places.

Here\'s my code:

SELECT ROUND(AVG(some_column)         


        

Answer 1

you can use the function below

 SELECT TRUNC(14.568,2);

the result will show :

14.56

you can also cast your variable to the desire type :

 SELECT TRUNC(YOUR_VAR::numeric,2)