use ruwiki_p;

SELECT enp.page_title, "P2423", enel.el_to, concat('S143'), concat('Q48183')

FROM page enp, externallinks enel, page_props, wikidatawiki_p.page wdp

#where el_to like ""

LEFT JOIN wikidatawiki_p.pagelinks wdpl ON wdpl.pl_from = wdp.page_id AND wdpl.pl_title = 'P2423' AND wdpl.pl_namespace = 120

#JOIN wikidatawiki_p.pagelinks wdpl2 ON wdpl2.pl_from = wdp.page_id AND wdpl2.pl_title = 'Q5' AND wdpl2.pl_namespace = 0

WHERE enp.page_namespace = 0 AND enel.el_to LIKE "http://fie.org/fencers/fencer/%"#"http://net.swimrankings./index.php?page=athleteDetail&athleteId=%"

                                            #LIKE "http://net.swimrankings.www./index.php?page=athleteDetail&athleteId=%"

        AND enel.el_from = enp.page_id

AND pp_page = enp.page_id AND pp_propname = 'wikibase_item'

AND wdp.page_title = pp_value AND wdp.page_namespace = 0

AND wdpl.pl_from IS NULL

group by enp.page_title

having count(enel.el_index)=1;