Postgresql sorting mixed alphanumeric data

Question

Running this query:

select name from folders order by name

returns these results:

alphanumeric
a test
test 20
test 19
test          


        

Answer 1

All of this methods sorted my selection in alphabetical order:

test 1
test 10
test 2
test 20

This solution worked for me (lc_collate: 'ru_RU.UTF8'):

SELECT name
FROM folders
ORDER BY SUBSTRING(name FROM '([0-9]+)')::BIGINT ASC, name;

test 1
test 2
test 10
test 20