substrb(month,1,4), sum(decode(substrb(month,5,2),'01',sell,0)), sum(decode(substrb(month,5,2),'02',sell,0)), sum(decode(substrb(month,5,2),'03',sell,0)), sum(decode(substrb(month,5,2),'04',sell,0)), === 補充1: 有學生成績表student,現(xiàn)在要用decode函數(shù)實現(xiàn)以下幾個功能...
www.dbjr.com.cn/article/364...htm 2025-5-26