一、条件函数
if 条件函数 if函数是最常用到的条件函数,其写法是if(xn,a,b), xn代表判断条件,如果xn时,那么结果返回a ,否则返回b。 selectif(age < 25 or age is null, 25岁以下, 25岁以上) as age_cnt,count(1) as number
from table…
Ubuntu Desktop 删除文件 1. right mouse click on the file -> Move to Trash2. right mouse click on the file -> DeleteReferences 1. right mouse click on the file -> Move to Trash
2. right mouse click on the file -> Delete
References …
一、题目
(一) 赛题原文
2024 ICM Problem F: Reducing Illegal Wildlife Trade
Illegal wildlife trade negatively impacts our environment and threatens global biodiversity. It is estimated to involve up to 26.5 billion US dollars per y…