Write SQL results back to same record - sql

Question

I am using the following script to grab the value from DWNAME and split the value into 10 individuals values. What I need to do after that is take those 10 values and write them back to the SAME record to the COLUMN values that are listed as the Aliases. Is there a way to, within the same code, perform the record update?
WITH DOCUMENT_ID AS
(SELECT
DWDOCID,
VALUE,
ROW_NUMBER() OVER(partition by DWDOCID Order by DWDOCID) AS RowNum
FROM [dwdata].[dbo].[SUAM]
CROSS APPLY
STRING_SPLIT(DWNAME,'^')
WHERE DWDOCID > '3071822' AND DOCUMENT_TYPE IS NULL
)
SELECT DWDOCID,
[1] AS DRAWER,
[2] AS DOCID,
[3] AS STUDENTNUMBER,
[4] AS STUDENTID,
[5] AS LASTNAME,
[6] AS FIRSTNAME,
[7] AS FIELD5,
[8] AS DOCTYPE,
[9] AS CREATEDATE,
[10] AS DOCUMENTYEAR
FROM DOCUMENT_ID
PIVOT
(MAX(VALUE)
FOR RowNum in ([1], [2], [3], [4], [5], [6], [7], [8], [9], [10])) AS PVT

Answer 1

Simple update to your code
WITH DOCUMENT_ID AS
(SELECT
DWDOCID,
VALUE,
ROW_NUMBER() OVER(partition by DWDOCID Order by DWDOCID) AS RowNum
FROM [SUAM]
CROSS APPLY STRING_SPLIT(DWNAME,'^')
WHERE DWDOCID > '3071822' AND DOCUMENT_TYPE IS NULL
)
update suam
set drawer=t.drawer,docid=t.docid,studentnumber=t.studentnumber,studentid=t.studentid
,lastname=t.lastname,firstname=t.firstname,field5=t.field5
,createdate=t.createdate,documentyear=t.documentyear
from suam s inner join
(
SELECT DWDOCID,
[1] AS DRAWER,
[2] AS DOCID,
[3] AS STUDENTNUMBER,
[4] AS STUDENTID,
[5] AS LASTNAME,
[6] AS FIRSTNAME,
[7] AS FIELD5,
[8] AS DOCTYPE,
[9] AS CREATEDATE,
[10] AS DOCUMENTYEAR
FROM DOCUMENT_ID
PIVOT
(MAX(VALUE)
FOR RowNum in ([1], [2], [3], [4], [5], [6], [7], [8], [9], [10])) AS PVT
)t on s.dwdocid=t.dwdocid