Help for this page
SELECT 1 + COUNT(1) INTO @sort FROM t_tree AS t ... SET f_sort = (@sort := @sort - 1) WHERE T.f_parent_id = 2 ORDER BY f_sort DESC;
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord }map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,