整个 w=10=wt
TSQL Row_Number
这个问题之前也有过类似的讨论,但我正在努力。
我需要根据客户购买模式找到前 N 个销售额..
理想情况下,这需要按年按月按客户排在前 N 个,但现在我只查看整个数据库的前 N 个。
我的查询如下:
-- QUERY TO SHOW TOP 2 CUSTOMER INVOICES BY CUSTOMER BY MONTH
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS 'SALES',
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC ) AS 'Row'
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
--WHERE
-- 'ROW' < 2
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
我无法理解给出的将 Row 限制为 =< N 的解决方案。
请帮忙。
试试这个。
-- QUERY TO SHOW TOP 2 CUSTOMER INVOICES BY CUSTOMER BY MONTH
;WITH Top2Customers
AS
(
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS 'SALES',
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC )
AS 'RowNumber'
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
)
SELECT * FROM Top2Customers WHERE RowNumber < 3
您必须将 select 包装到另一个中才能使用 row_number()
产生的值
select * from (
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS SALES,
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC ) AS RowNo
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
--WHERE
-- 'ROW' < 2
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
) base where RowNo < 2
这个问题之前也有过类似的讨论,但我正在努力。
我需要根据客户购买模式找到前 N 个销售额..
理想情况下,这需要按年按月按客户排在前 N 个,但现在我只查看整个数据库的前 N 个。
我的查询如下:
-- QUERY TO SHOW TOP 2 CUSTOMER INVOICES BY CUSTOMER BY MONTH
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS 'SALES',
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC ) AS 'Row'
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
--WHERE
-- 'ROW' < 2
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
我无法理解给出的将 Row 限制为 =< N 的解决方案。
请帮忙。
试试这个。
-- QUERY TO SHOW TOP 2 CUSTOMER INVOICES BY CUSTOMER BY MONTH
;WITH Top2Customers
AS
(
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS 'SALES',
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC )
AS 'RowNumber'
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
)
SELECT * FROM Top2Customers WHERE RowNumber < 3
您必须将 select 包装到另一个中才能使用 row_number()
产生的值select * from (
SELECT
bill_to_code,
INVOICE_NUMBER,
SUM( INVOICE_AMOUNT_CORP ) AS SALES,
ROW_NUMBER() OVER ( PARTITION BY bill_to_code ORDER BY SUM( INVOICE_AMOUNT_CORP ) DESC ) AS RowNo
FROM
FACT_OM_INVOICE
JOIN dim_customer_bill_to ON FACT_OM_INVOICE.dim_customer_bill_to_key = dim_customer_bill_to.dim_customer_bill_to_key
--WHERE
-- 'ROW' < 2
GROUP BY
invoice_number,
Dim_customer_bill_to.bill_to_code
) base where RowNo < 2