gorm中自己寫sql的實現

type Result struct {
　　Total int
}
var result Result
dao.DB(dao.HomeworkTable).Raw("SELECT sum(round((UNIX_TIMESTAMP(finishtime)-UNIX_TIMESTAMP(stime))/60)) as total from homework WHERE remarks !='' AND ctime = to_days(now()) AND finishtime = TO_DAYS(NOW())").Select("total").Scan(&result)