Update records in table from CTE
SqlSql ServerTsqlCommon Table-ExpressionSql Problem Overview
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?
Sql Solutions
Solution 1 - Sql
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
Solution 2 - Sql
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 ...
Solution 3 - Sql
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
Solution 4 - Sql
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