I'm trying to delete all wordpress comments with only one word. I found this mysql query to delete all comments at once, but that's not what I want to achieve:
DELETE FROM wp_comments WHERE comment_approved = '0'
DISCLAIMER : Not a WordPress Developer, Just a MySQL DBA
If you have privileges to login to MySQL and query data you could collect all the
comment_ID values that have one word.
SELECT comment_ID FROM wp_comments WHERE REPLACE(TRIM(comment_content),' ','')=TRIM(comment_content);
You can test this by also seeing the comment_content
SELECT comment_ID,comment_content FROM wp_comments WHERE REPLACE(TRIM(comment_content),' ','')=TRIM(comment_content);
Using the WordPress API, retrieve those
comment_ID values and delete them.
Give it a Try !!!
Other posts have been given for bulk deleting of comments (none of these are my posts):