How to count number of digits after a decimal place?

Question

I am new to writing queries. I need a query that tells the number of digits after a decimal place.

Eg:

1001.00 = 0 digits after decimal
1001.01 = 2 digits after decimal
1001.010 = 2 digits after decimal

How can I do this?

Answer 1

ORACLE SOLUTION

This can be achieved by multiple ways one of them is below,

SELECT
length((1001.00) - trunc(1001.00)) - 1 as digits_after_decimal
FROM
dual;
SELECT
length((1001.01) - trunc(1001.01)) - 1 as digits_after_decimal
FROM
dual;    
 SELECT
length((1001.010) - trunc(1001.010)) - 1 as digits_after_decimal
FROM
dual;