The count-and-say sequence is the sequence of integers with the first five terms as following: 1. 12. 113. 214. 12115. 111221 1 is read off as “one 1” or 11. 11 is read off
group by 分组 --每个工作的人数select count(job) from emp group by job;--有多少工作select count(coutn(job)) from emp group by job;--每个工作的最高工资select max(sal) from emp group by job;--每个工作的最低工资select min(sal
38 - 换座位 -- 方法一select(casewhen id%2=1 and id=(select max(id) from seat) then idwhen id%2=0 then id-1else id+1end) as id, studentfromseatorder byid;-- 方法二selectif(id%2=0,id-1,if(id=(select max(i
Paper1 Self-Supervised Video Forensics by Audio-Visual Anomaly Detection 摘要原文: Manipulated videos often contain subtle inconsistencies between their visual and audio signals. We propose a video foren