Normal pivot to convert into dynamic or any other - sql

Question

I have table with this kind of data
ID name St_dt points
1 Mohan 2017-07-10 50
1 Mohan 2017-07-07 30
I want result Set like this
Output :
ID name 2017-07-10 2017-07-07 Difference %
1 Mohan 50 30 20 66.7
I have implemented Pivot function and achieved above result
sample Script :
Select
ID,
name,
[2017-07-10],
[2017-07-07],
[Difference] = [2017-07-10] - [2017-07-07],
case when [2017-07-10] > [2017-07-07]
then cast(round (([2017-07-10] - [2017-07-07]) *1. / [2017-07-07] * 100, 2) as decimal(3,1))
else 0
end as [%]
from (
select ID,name,St_dt,points from Table
)T
PIVOT (MAX(points)FOR St_dt IN ([2017-07-10],[2017-07-07]) )PVT
Up to now this is fine but when I'm trying achieve the same in Dynamic Pivot I'm facing the issue at percentage calculation. How i can achieve in Dynamic.
Hope my question is clear
Please check my dynamic query up to Difference calculation unable to achieve percentage calculation in dynamic
Dynamic Script :
DECLARE #cols AS NVARCHAR(MAX)='';
DECLARE #query AS NVARCHAR(MAX)='';
DECLARE #select_cols AS NVARCHAR(MAX)='';
DECLARE #diff_cols varchar(MAX) = '';
SELECT #cols = #cols + QUOTENAME(St_dt) + ',' FROM (select distinct CONVERT(DATE,St_dt)St_dt from #T
) as tmp ORDER BY St_dt desc
SELECT #cols = substring(#cols, 0, len(#cols))
select #cols
Set #diff_Cols = stuff((SELECT '-Max('+Quotename(CONVERT(DATE, St_dt))+') '
FROM #T
group by St_dt
ORDER BY St_dt DESC
FOR xml path('')) ,1,1,'')
select #diff_cols
Select #query = '
Select ID,name,
'+#cols+',
Difference = '+#diff_cols+'
from (
SELECT ID,name,St_dt,points
FROM #T
)T
PIVOT (MAX(Points)FOR St_dt IN ('+#cols+') )PVT
GROUP BY ID,name,'+#cols+'
'
EXEC (#query)

Answer 1

Try this below ,It may helps you
IF OBJECT_ID('tempdb..#TempTable') IS NOT NULL
DROP TABLE #TempTable
Declare #Table TABLE (ID INT,name VARCHAR(50),St_dt DATE,points INT)
INSERT INTO #Table
SELECT 1,'Harini','2017-07-10',50 Union all
SELECT 1,'Harini','2017-07-07',30
SELECT * INTO #TempTable FROM #Table
DECLARE #Sql NVARCHAR(max)
,#SelectSQL NVARCHAR(max)
,#COlumns NVARCHAR(max)
,#Previousday NVARCHAR(max)
,#Difference NVARCHAR(max)
,#CurrentDay NVARCHAR(max)
SELECT #COlumns=STUFF((SELECT ', '+ QUOTENAME(CAST(St_dt AS VARCHAR(10)))FROM #TempTable GROUP BY St_dt ORDER BY St_dt DESC FOR XML PATH('')),1,1,'')
SELECT #SelectSQL = STUFF((
SELECT ', ' + 'ISNULL( MAX( ' + QUOTENAME(CAST(St_dt AS VARCHAR(10))) +' )'+ ',' + '''0''' + ') AS ' + QUOTENAME(CAST(St_dt AS VARCHAR(10)))
FROM #TempTable GROUP BY St_dt ORDER BY ST_DT DESC
FOR XML PATH('')
), 1, 1, '')
SELECT #CurrentDay=SUBSTRING(#COlumns,CHARINDEX(',',#COlumns)+1,LEN(#COlumns)),#Previousday=SUBSTRING(#COlumns,0,CHARINDEX(',',#COlumns))
SET #Difference=#Previousday+' - '+ #CurrentDay
SET #Sql=N'
SELECT ID,name,'+#SelectSQL+', [Difference]='+#Difference+',
CASE WHEN '+#Previousday+' > '+#CurrentDay+' THEN
CAST(ROUND (('+#Difference+') *1./'+#CurrentDay+'* 100, 2) AS DECIMAL(3,1)) ELSE 0 END AS [%]
FROM (
SELECT ID,name,St_dt,points FROM #TempTable
)Src
PIVOT
(
MAX(points) FOR St_dt IN ('+#COlumns+')
)AS PVT
Group by PVT.ID,PVT.name,
PVT.'+#CurrentDay+',PVT.'+#Previousday+''
PRINT #Sql
EXECute(#Sql)
Result
ID name 2017-07-10 2017-07-07 Difference %
------------------------------------------------------
1 Harini 50 30 20 66.7