杨梅核仁是历史悠久的中药材，也可食用，但真正吃它的人并不多见。杨梅核仁可直接生吃，据说加糖煮过以后再吃更美味。杨梅核仁作为中药材有利水消肿及敛疮之功效，常用于脚气或牙疳等症的治疗。杨梅果肉食用完以后，
I have multiple columns in a mySQL table. Three of the columns are named i100s, i60s and i25s and what I want to do is get the sum of all three entries . currently I have this code
加载中,请稍侯......