[英]t-SQL to find Top 10 Records for Each Group
我试图弄清楚如何返回每组Trans.TranSID的前10个记录。
SELECT a.ABID, a.ABName, t.TranSID, SUM(IIF(TranTypeID = 'CO', td.Qty * CAST(td.Price AS money) * - 1,
td.Qty * CAST(td.Price AS money))) AS TotalSales
FROM Trans t INNER JOIN
TransDetail td ON t.TranID = td.TranID INNER JOIN
ABook a ON t.TranABID = a.ABID
WHERE (t.TranDate BETWEEN CONVERT(DATETIME, '2012-01-01 00:00:00', 102) AND CONVERT(DATETIME, '2013-01-01 00:00:00', 102)) AND
t.TranTypeID in ('SO','CA','CO') AND (t.TranStatus <> 'V')
GROUP BY a.ABID, a.ABName, t.TranSID
HAVING (NOT (a.ABName LIKE '%cash%'))
ORDER BY t.TranSID, TotalSales Desc
我可以在select语句中添加“TOP 10”,但不管是哪个组,这都会给我前10个帐号。 有25组Trans.TranSID,我试图获得每组的前10名。
我认为你正在寻找带有PARTITION BY
ROW_NUMBER()
SELECT *
FROM (
SELECT
ROW_NUMBER() OVER(PARTITION BY t.TranSID ORDER BY t.TranSID, SUM(IIF(TranTypeID = 'CO', td.Qty * CAST(td.Price AS money) * - 1, td.Qty * CAST(td.Price AS money))) DESC) as RowNum,
a.ABID,
a.ABName,
t.TranSID,
SUM(IIF(TranTypeID = 'CO', td.Qty * CAST(td.Price AS money) * - 1, td.Qty * CAST(td.Price AS money))) AS TotalSales
FROM Trans t
INNER JOIN TransDetail td
ON t.TranID = td.TranID
INNER JOIN ABook a
ON t.TranABID = a.ABID
WHERE (t.TranDate BETWEEN CONVERT(DATETIME, '2012-01-01 00:00:00', 102) AND CONVERT(DATETIME, '2013-01-01 00:00:00', 102))
AND t.TranTypeID in ('SO','CA','CO')
AND (t.TranStatus <> 'V')
GROUP BY a.ABID, a.ABName, t.TranSID
HAVING (NOT (a.ABName LIKE '%cash%'))
) a
WHERE a.RowNum <=10
这将为分组中的每个记录分配行号(由PARTITION
定义的列,从1到n。从那里,您可以在其上运行SELECT
以获取每组的任意数量的记录。
我不是特别熟悉t-sql,不幸的是我无法访问t-sql数据库来测试这是否能实现你的目标。
也就是说,我认为这是使用子查询和ROW_NUMBER函数完成它的一种方法。
SELECT
*
FROM (
SELECT
a.ABID
, a.ABName
, t.TranSID
, SUM(IFF(TranTypeID = 'CO'
, td.Qty * CAST(td.Price AS MONEY) * -1
, td.Qty * CAST(td.Price AS MONEY))) AS TotalSales
, ROW_NUMBER()
OVER(PARTITION BY t.TranSID
ORDER BY SUM(IFF(TranTypeID = 'CO'
, td.Qty * CAST(td.Price AS MONEY) * -1
, td.Qty * CAST(td.Price AS MONEY))) DESC) AS row
FROM
Trans t
INNER JOIN TransDetail td
ON t.TranID = td.TranID
INNER JOIN ABook a
ON t.TranABID = a.ABID
WHERE
(t.TranDate BETWEEN CONVERT(DATETIME, '2012-01-01 00:00:00', 102) AND CONVERT(DATETIME, '2013-01-01 00:00:00', 102))
AND t.TranTypeID in ('SO','CA','CO')
AND (t.TranStatus <> 'V')
GROUP BY
a.ABID
, a.ABName
, t.TranSID
HAVING
(NOT (a.ABName LIKE '%cash%'))
) q
WHERE
q.row <= 10
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