Using UNPIVOT in constructed String Query Dynamic - sql-server

Question

I am building a query where I will need a UNPIVOT on dynamic columns. (abcd are example string name)
data1 data2 com fr random
1 2 a d sq
3 4 b a fd
UNPIVOT like so :
data1 data2 Name Website random
1 2 a com sq
1 2 d fr sq
3 4 b com fd
3 4 a fr fd
The matter here is for building my First table I use dynamic SQL (#QueryFinal) because of the column.
Here is my UNPIVOT dynamic Query
'SELECT data1, data2, Name, Website
FROM '+#QueryFinal+'
UNPIVOT (
Name FOR Website in ('+#WebsiteCol+')
) f;'
In my #QueryFinal I have a WHERE .... ORDER BY, it seems like the UNPIVOT can't handle it.
When I delete the WHERE and ORDER BY clause I get the error :
Incorrect syntax near the keyword 'UNPIVOT'.

Answer 1

Try the following dynamic-pivot:
--drop table if exists unpivottest
create table unpivotTest (data1 int, data2 int, com char(1), fr char(1))
insert into unpivotTest
select 1, 2, 'a' , 'd' union all
select 3, 4, 'b', 'a'
select * from unpivotTest
declare #colsunpivot as nvarchar(max),
#query as nvarchar(max)
select #colsunpivot = stuff((select ','+ quotename(c.name)
from sys.columns c
where c.object_id = object_id('dbo.unpivottest') and c.name not like '%data%'
for xml path('')), 1, 1, '')
set #query
= 'select data1, data2, name, website
from unpivottest
-- you cannot do the ordering here
unpivot
(
name
for website in ('+ #colsunpivot +')
) u
where data1 = 1 -- here you can use your where clause
order by data1' -- here you can do the ordering by any col
--print #query
exec sp_executesql #query;
Check a working demo here.

Answer 2

Even if it isn't the same column name as in the example here is the final Query built thanks for the help. I put the WHERE clause in the first SELECT and the ORDER BY in the UNPIVOT
DECLARE #QueryFinal VARCHAR(max) = #Query + #QueryBis + '
from #CALENDAR_FINAL temp
LEFT JOIN #BURSTS b on b.bur_id = temp.bur_id
LEFT JOIN digital_calendar_status dcs ON dcs.dcs_date = temp.[Date] AND dcs.dif_id = '+convert(varchar(2),#FormatId)+'
LEFT JOIN digital_calendar_event dce ON dce.dce_date = temp.[Date]
WHERE '+#ConditionConflict+#ConditionIcon+#ConditionDate
DECLARE #Pivot VARCHAR(2000)='
SELECT
DateStr, f.Conflict, f.dcs_id, f.Status, f.Website, f.Advertiser, f.Comment, f.EventName, f.EventIcone
FROM ('+#QueryFinal+') AS a
UNPIVOT
(
Advertiser
FOR Website IN ('+#WebsiteCol+')
) f
ORDER BY Date;
'