The meaning of the title: Every connected block in the desert is a cactus; a connected block is a cactus if and only if there are no heavy edges and self-rings in the connected block , And each sid
Tag: ring
MySQL case: calculation ring ratio
select a.day_num as “Serial Number”,
a.create_time as “Shelf time”,
a.clue_num as “The amount of vehicles on the shelves”,
((a.clue_num/b.clue_num)-1) as “Chain Ratio”
from
(
select cast(