Regex to match all non-digit characters which are interspersed with digits with SQL

问题

Using SQL Anywhere 16 regex (Perl 5 equivalent) I would like to match all non-digit characters in the following string:

This 100 is 2 a 333 test. such that the match results in This is a test.

I have a feeling this requires lookarounds but I'm not sure of the exact syntax.

Some of my failed attempts:

\D* matches This

\D*(?=\d) matches This

(\D*(?=\d*)|(?<=\d)\D*)* matches This

来源：https://stackoverflow.com/questions/36020273/regex-to-match-all-non-digit-characters-which-are-interspersed-with-digits-with