Question

如何添加查询max（o.Acct）-1行。我需要可视化最后两个o.Acct行。我的查询目前只显示max（o.Acct）

SELECT Max(o.Acct) AS [MaxAcct],o.ObjectID,o.Opertype
FROM Operations o
GROUP By o.ObjectID,o.Opertype

Answer 1

如果您想查看最后两行（每组），最好使用ROW_NUMBER()而不是GROUP BY。

SELECT
  *
FROM
(
  SELECT
    *,
    ROW_NUMBER() OVER (PARTITION BY ObjectID,
                                    Opertype
                           ORDER BY Acct DESC
                      )
                         AS sequence_id
  FROM
    Operations
)
  sortedOperations
WHERE
  sequence_id <= 2
ORDER BY
  ObjectID,
  Opertype,
  Acct

Answer 2

如果你想要最后两件事，我会想order by和top。像这样：

select top (2) o.*
from Operations o
order by o.acct desc;

MS SQL将max（） - 1添加到qyery

2 个答案: