dionys

#!perl -plaF'[,:]\s'
$n//=pop@F;pop@F;push@$_,@F
for@F}{$i=1;for(;$n;$i++){$n{$_}//=$n
ne$_?$i:0for@$n;@$n=();($n)=grep@$_,keys%n}$_=$n{Erdos}//Inf

dionys

UPDATE moz_historyvisits
    SET from_visit = 0 WHERE id IN (
        SELECT t1.id
            FROM moz_historyvisits t1
            LEFT JOIN moz_historyvisits t2 ON t1.from_visit = h2.id
            WHERE t2.id IS NULL AND t1.from_visit <> 0);
DELETE FROM moz_inputhistory
    WHERE place_id IN (
        SELECT t1.place_id
            FROM moz_inputhistory t1