look at http://www.mysqltutorial.org/mysql-find-duplicate-values/
to get meta values, you need to assign :
wp_postmeta.meta_key = 'syndication_permalink' AND wp_postmeta.meta_value="$yourvalue"
look at http://www.mysqltutorial.org/mysql-find-duplicate-values/
to get meta values, you need to assign :
wp_postmeta.meta_key = 'syndication_permalink' AND wp_postmeta.meta_value="$yourvalue"