Question

我想查看最后记录的数据，但我无法弄清楚查询。

这是我现在的查询。它返回本周的所有数据：

SELECT DATENAME(dw, t.date) AS date, kwh AS kwh, time
FROM tbl_totalEnergy t
WHERE t.date > = DATEADD(wk, DATEDIFF(wk, 0, GETDATE() -1), 0)

Answer 1

如果我理解正确，您可以查询如下：

Select * from (
   SELECT DATENAME(dw,t.date) as date, kwh as kwh, time,
          RowN = Row_Number() over(partition by Year(t.date), DatePart(wk,t.date), Day(t.date) order by t.date desc)
                FROM tbl_totalEnergy t
  ) a
  Where a.RowN = 1
  and a.[date] between getdate() and dateadd(dd,-7,getdate())

Answer 2

尝试如下（我假设Date columnn的类型为Date）

SELECT * FROM(
SELECT ROW_NUMBER() OVER(PARTITION BY t.DATE ORDER BY t.time DESC) RNO
, kwh as kwh, t.time 
FROM tbl_totalEnergy t
WHERE t.date > = DATEADD(wk,DATEDIFF(wk,0, GETDATE() -1 ),0) 
)A 
WHERE RNO=1

Answer 3

时间在一个单独的栏目中，所以：

SELECT DATENAME(dw, t.date) as date, kwh as kwh, time
FROM (SELECT t.*,
             ROW_NUMBER() OVER (PARTITION BY DATENAME(dw, t.date) ORDER BY t.date DESC, t.time DESC) as seqnum
      FROM tbl_totalEnergy t
      WHERE t.date >= DATEADD(week, DATEDIFF(week, 0, GETDATE() -1 ), 0) 
    ) t
WHERE seqnum = 1;

如何查看当前每周的最后记录数据？

3 个答案: