I'm having trouble coming up with a vim find/replace to delete all the words on a line except the last one, i.e. in a bit of SQL, it be nice to generate a list of all the aliases from a bunch of code

select 
column_a alias_a,
column_b alias_b,
column_c alias_c

from 
...

I'd like to just generate the list 

alias_a, alias_b, alias_c

So I think i want to delete all words that aren't immediately followed by a comma and line ending

vim replace
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