Update records in table from CTE

I have the following CTE that will give me the DocTotal for the entire invoice.

 ;WITH CTE_DocTotal
AS
(
SELECT SUM(Sale + VAT) AS DocTotal
FROM PEDI_InvoiceDetail
GROUP BY InvoiceNumber
)


UPDATE PEDI_InvoiceDetail
SET DocTotal = CTE_DocTotal.DocTotal

Now with this result I want to enter into the column the DocTotal value inside PEDI_InvoiceDetail.

I know is not going to work and I know I am missing something, what is it?

168407 次浏览

小开

You don't need a CTE for this

UPDATE PEDI_InvoiceDetail
SET
DocTotal = v.DocTotal
FROM
PEDI_InvoiceDetail
inner join
(
SELECT InvoiceNumber, SUM(Sale + VAT) AS DocTotal
FROM PEDI_InvoiceDetail
GROUP BY InvoiceNumber
) v
ON PEDI_InvoiceDetail.InvoiceNumber = v.InvoiceNumber

小开

WITH CTE_DocTotal (DocTotal, InvoiceNumber)
AS
(
SELECT  InvoiceNumber,
SUM(Sale + VAT) AS DocTotal
FROM    PEDI_InvoiceDetail
GROUP BY InvoiceNumber
)
UPDATE PEDI_InvoiceDetail
SET PEDI_InvoiceDetail.DocTotal = CTE_DocTotal.DocTotal
FROM CTE_DocTotal
INNER JOIN PEDI_InvoiceDetail ON ...

小开

最佳答案

Updates you make to the CTE will be cascaded to the source table.

I have had to guess at your schema slightly, but something like this should work.

;WITH T AS
(   SELECT  InvoiceNumber,
DocTotal,
SUM(Sale + VAT) OVER(PARTITION BY InvoiceNumber) AS NewDocTotal
FROM    PEDI_InvoiceDetail
)
UPDATE  T
SET     DocTotal = NewDocTotal

小开

Try the following query:

;WITH CTE_DocTotal
AS
(
SELECT SUM(Sale + VAT) AS DocTotal_1
FROM PEDI_InvoiceDetail
GROUP BY InvoiceNumber
)


UPDATE CTE_DocTotal
SET DocTotal = CTE_DocTotal.DocTotal_1