SQL Query rows need to be converted to columns dynamically - sql

Question

Please help me to solve my below query -
I have the following data in my table-
Agent Variable Chandigarh NewDelhi
ABC Leads 102.00 10
ABC TotalTime 10.52 1
ABC RPH 22.79 22
ABC TotalRev 239.70 23
XYZ Leads 14.00 14
XYZ TotalTime 1.52 1
XYZ RPH 21.64 21
XYZ TotalRev 32.90 32
I want the solution like this
Agent Chandigarh_Leads Chandigarh_TotalTime Chandigarh_RPH Chandigarh_RPH_TotalRev NewDelhi_Leads .......
ABC 102.00 10.52 22.79 239.70 10 .......
XYZ 14 1.52 21.64 32.90 14 ............
FYI, I can have more states in columns, it has no limits it may be 10 or 20 or 5 etc. So i need result dynamic query. Please help me, is it possible without static query?

Answer 1

Dynamic SQL + pivoting:
DECLARE #sql nvarchar(max),
#columns nvarchar(max),
#col_to_cast nvarchar(max),
#col_unpvt nvarchar(max)
--This will give:
--,[Chandigarh_Leads],[Chandigarh_RPH]....[NewDelhi_TotalRev],[NewDelhi_TotalTime]
SELECT #columns = COALESCE(#columns,'')+',['+name+'_'+Variable +']'
FROM (
SELECT DISTINCT Variable
FROM #yourtable) v
CROSS JOIN (
SELECT name
FROM sys.columns
WHERE object_id = OBJECT_ID(N'#yourtable')
AND name not in ('Agent', 'Variable')
) c
ORDER BY c.name, v.Variable
--As columns while unpivoting must be same type we need to cast them in same datattype:
--This will give
--,CAST([Chandigarh] as float) as [Chandigarh],CAST([NewDelhi] as float) as [NewDelhi]
SELECT #col_to_cast = COALESCE(#col_to_cast,'')+',CAST(' + QUOTENAME(name)+ ' as float) as '+ QUOTENAME(name)
#col_unpvt = COALESCE(#col_unpvt,'') + ','+ QUOTENAME(name)
FROM sys.columns
WHERE object_id = OBJECT_ID(N'#yourtable')
AND name not in ('Agent', 'Variable')
SELECT #sql = N'
SELECT *
FROM (
SELECT Agent,
[Columns]+''_''+Variable as ColName,
[Values] as ColVal
FROM (
SELECT Agent,
Variable'+#col_to_cast+'
FROM #yourtable
) p
UNPIVOT (
[Values] FOR [Columns] IN ('+STUFF(#col_unpvt,1,1,'')+')
) unpvt
) t
PIVOT (
MAX(ColVal) FOR ColName IN ('+STUFF(#columns,1,1,'')+')
) pvt'
EXEC sp_executesql #sql
Output:
Agent Chandigarh_Leads Chandigarh_RPH Chandigarh_TotalRev Chandigarh_TotalTime NewDelhi_Leads NewDelhi_RPH NewDelhi_TotalRev NewDelhi_TotalTime
ABC 102 22,79 239,7 10,52 10 22 23 1
XYZ 14 21,64 32,9 1,52 14 21 32 1