Get the number of digits after the decimal point of a float (with or without decimal part)

Question

I have following list of Amount (float) in my table.

Amount
123
123.1
123.0123
123.789456

How can i get the number of digits a

Answer 1

You can do It in following:

QUERY

SELECT Amount, 
       CASE WHEN FLOOR(Amount) <> CEILING(Amount) THEN LEN(CONVERT(INT,CONVERT(FLOAT,REVERSE(CONVERT(VARCHAR(50), Amount, 128))))) ELSE 0 END AS Result
FROM YourTable

OUPUT

Amount      Result
123         0
123,1       1
123,0123    4
123,789456  6