干oracle 047文章12当问题,经验group by 声明.因此邂逅group by rollup,decode,grouping,nvl,nvl2,nullif,RATIO_TO_REPORT等一下. 1. decode 与if...then,case...when...这类流数据语句功能差点儿相同 decode(条件,值1,返回值1,值2,返回值2,...值n,返回值n,缺省值) 该函数的含义例如以下: IF 条件=值1 THEN RETURN(值1) ELSIF 条件=值2 TH
Cow Exhibition Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 10200 Accepted: 3977 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to
Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to the public that they are both smart and fun. In order to do this, Bessie has organized an exhibitio