Getting the last word from a Postgres string, declaratively

Question

[EDIT] original title of this question was \"Getting the last element of a Postgres array, declaratively\"

How to obtain the last element of the array in Postgr

Answer 1

You can combine string_to_array and array_length

select 
(string_to_array(column_name, '.'))[array_length((string_to_array(column_name, '.')), 1)]
from table_name;

This will split the string in column_name into array using "." as delimiter and will give you the last part