查询以查找连续2个月（列）为负的行

Question

我有一个SQL Server 2008表，其中的列代表每12个月。我想找到连续2个月有负余额的行。

编辑：我需要将所有正列相加，所以我使用了它。如果有人知道更简单的方式让我知道。

  SELECT SUM(case when Oct > 0 then Oct else 0 end) + 
         SUM(case when Nov > 0 then Nov else 0 end) +
         SUM(case when Dec > 0 then Dec else 0 end) +
         SUM(case when Jan > 0 then Jan else 0 end) +
         SUM(case when Feb > 0 then Feb else 0 end) +
         SUM(case when Mar > 0 then Mar else 0 end) +
         SUM(case when Apr > 0 then Apr else 0 end) +
         SUM(case when May > 0 then May else 0 end) +
         SUM(case when Jun > 0 then Jun else 0 end) +
         SUM(case when Jul > 0 then Jul else 0 end) +
         SUM(case when Aug > 0 then Aug else 0 end) +
         SUM(case when Sep > 0 then Sep else 0 end) as 'Sum of positive months'

Answer 1

你可以直截了当地做到：

select * from tablename
where (Oct < 0 and Nov < 0) or
      (Nov < 0 and Dec < 0) or
      (Dec < 0 and Jan < 0) or
      (Jan < 0 and Feb < 0) or
      ...