SQL to find upper case words from a column

Question

I have a description column in my table and its values are:

This is a EXAMPLE
This is a TEST
This is a VALUE

I want to display only EXAMPLE

Answer 1

It is possible to achieve this thanks to the REGEXP_REPLACE function:

SELECT REGEXP_REPLACE(my_column, '(^[A-Z]| |[a-z][A-Z]*|[A-Z]*[a-z])', '') AS Result FROM my_table

It uses a regex which replaces first upper case char of the line and converts every lower case char and space with blanks.