Using dynamic dates in a SQL pivot - sql-server-2008

Question

I have the below code that works well but I don't want to continue typing in the dates daily.
My dates will always be the last 7 days (including today) - meaning that the table will be purged daily and the new data pull in daily.
select *
from
(
select EMP_ID, EMP_SHORT_NAME, SEG_CODE,
NOM_DATE
from sick_codes_Test$
) src
pivot
(
max(seg_code)
for nom_date in ([2018-07-14], [2018-07-15],[2018-07-16],[2018-07-17],[2018-07-18],
[2018-07-19], [2018-07-20])
) piv
So for "nom_date in" how can I make those dates the dates that will just be in the table?
I tried following along with the following link
https://www.mssqltips.com/sqlservertip/2783/script-to-create-dynamic-pivot-queries-in-sql-server/
But wasn't able to make it work
From following the above URL I came up with this code
DECLARE #columns NVARCHAR(MAX), #sql NVARCHAR(MAX);
SET #columns = N'';
SELECT #columns += N',' + QUOTENAME(NOM_DATE)
FROM sick_codes_Test$
SET #sql = N'
SELECT ' + STUFF(#columns, 1, 2, '') + '
FROM
(
SELECT EMP_ID, EMP_SHORT_NAME, SEG_CODE
from sick_codes_Test$
) AS j
PIVOT
(
max(seg_code) FOR nom_date IN ('
+ STUFF(REPLACE(#columns, ', [', ',['), 1, 1, '')
+ ')
) AS p;';
PRINT #sql;
EXEC sp_executesql #sql;
Any help would be greatly appreciated.

Answer 1

After more digging around I think I found a possible solution but after running the below I seeing the EMP_ID being duplicated.
DECLARE #DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE #ColumnName AS NVARCHAR(MAX)
--Get distinct values of the PIVOT Column
SELECT #ColumnName= ISNULL(#ColumnName + ',','')
+ QUOTENAME(NOM_DATE)
FROM (SELECT DISTINCT NOM_DATE FROM sick_codes_Test$ ) AS NOM_DATE
order by NOM_DATE ASC
--Prepare the PIVOT query using the dynamic
SET #DynamicPivotQuery =
N'SELECT EMP_ID, EMP_SHORT_NAME, ' + #ColumnName + '
FROM sick_codes_Test$
PIVOT(MAX(SEG_CODE)
FOR NOM_DATE IN (' + #ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql #DynamicPivotQuery
After more modifications I finally found a solution that worked
DECLARE #DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE #ColumnName AS NVARCHAR(MAX)
--Get distinct values of the PIVOT Column
SELECT #ColumnName= ISNULL(#ColumnName + ',','')
+ QUOTENAME(NOM_DATE)
FROM (SELECT DISTINCT NOM_DATE FROM sick_codes_Test$ ) AS NOM_DATE
order by NOM_DATE ASC
--Prepare the PIVOT query using the dynamic
SET #DynamicPivotQuery =
N'SELECT EMP_ID, EMP_SHORT_NAME, ' + #ColumnName + '
FROM (
SELECT DISTINCT EMP_ID,
EMP_SHORT_NAME,
SEG_CODE,
NOM_DATE
FROM sick_codes_Test$
)t
PIVOT(MAX(SEG_CODE)
FOR NOM_DATE IN (' + #ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql #DynamicPivotQuery