How to convert string to byte and the GB in Oracle SQL?

Question

I have a field which store messages and I want to get how many Gb's this message is consuming. For example message: "Hi how are you?" So I want to convert this string in Gb's

Answer 1

To get the size of the string in gigabytes, you can use:

SELECT LENGTHB( 'Hi how are you?' ) / POWER( 2, 30 ) AS size_in_gigabytes
FROM   DUAL;

Which outputs:

SIZE_IN_GIGABYTES
.000000013969838619232177734375