sql - 最少 9 周 最多 15 周 平均 16 周

Question

这就是我想要查询的内容

• 平均 16 周
• 最少 9 周
• 最多 15 周
• 不按字母顺序增加月份

到目前为止，我的查询看起来像

我的代码是

TRANSFORM SUM(Detail.Quantity)
SELECT Detail.ItemCode
FROM Detail INNER JOIN Header ON Detail.SalesOrderNo = Header.SalesOrderNo
WHERE Header.OrderDate>=dateadd("m",-4,Date())
GROUP BY Detail.ItemCode
PIVOT MonthName(Month([Header.OrderDate]));

提前非常感谢您！

如果有人能回答为什么在 2017 年 2 月 1 日显示“十月”，我们将不胜感激？而我的代码有WHERE Header.OrderDate>=dateadd("m",-4,Date())?

Answer 1

考虑两个交叉表查询的连接。

CrossTab1查询（在PIVOT子句中指定列顺序）

TRANSFORM SUM(Detail.Quantity)
SELECT Detail.ItemCode
FROM Detail INNER JOIN Header ON Detail.SalesOrderNo = Header.SalesOrderNo
WHERE Header.OrderDate>=dateadd("m",-4,Date())
GROUP BY Detail.ItemCode
PIVOT MonthName(Month([Header.OrderDate]))
  IN ('November', 'December', 'January', 'February');

UnionAggQ 查询（另存为单独的查询）

下一个交叉表需要另一个查询作为源，特别是 ItemCode 与分类 Metric 列的聚合的联合查询：

SELECT Detail.ItemCode,
       'AVG 16 WEEKS' AS Metric,
       AVG(Detail.Quantity) AS AggDetailQty
FROM Detail INNER JOIN Header ON Detail.SalesOrderNo = Header.SalesOrderNo
WHERE Header.OrderDate >= DATEADD("ww",-16, Date())
GROUP BY Detail.ItemCode

UNION ALL

SELECT Detail.ItemCode,
       'MIN 9 WEEKS' AS Metric,
       MIN(Detail.Quantity) AS AggDetailQty 
FROM Detail INNER JOIN Header ON Detail.SalesOrderNo = Header.SalesOrderNo
WHERE Header.OrderDate >= DATEADD("ww",-9, Date())
GROUP BY Detail.ItemCode

UNION ALL

SELECT Detail.ItemCode,
       'MAX 15 WEEKS' AS Metric,
       MAX(Detail.Quantity) AS AggDetailQty
FROM Detail INNER JOIN Header ON Detail.SalesOrderNo = Header.SalesOrderNo
WHERE Header.OrderDate >= DATEADD("ww",-15, Date())
GROUP BY Detail.ItemCode

Crosstab2查询

TRANSFORM SUM(q.AggDetailQty)
SELECT q.ItemCode
FROM UnionAggQuery q
GROUP BY q.ItemCode
PIVOT q.Type IN ('AVG 16 WEEKS', 'MIN 9 WEEKS', 'MAX 15 WEEKS');

最终查询（加入两个交叉表）

SELECT t1.*, t2.*
FROM CrossTab1 t1 
INNER JOIN CrossTab2 t2
ON t1.ItemCode = t2.ItemCode