Columns to rows and rows to column conversion without pivot/unpivot - sql

Question

All I need is convert Column(A1/A2) into rows and rows(1 into Jan) into columns.
Input:
Here A1/A2 belongs to say A and they are calculated as A1/A2 for each month.
Month A1 A2 B1 B2 C1 C2
1 120 60 40 80 120 120
2 50 50 40 20 60 30
3 50 25 40 10 90 30
I need below o/p without using pivot and unpivot
O/P:
X Jan(1 is denoting Jan) Feb Mar
A 120/60(calculation:A1/A2) 40/80 120/120
B 50/50 40/20 60/30
C 50/25 40/10 90/30
I tried but my query is too long as I am using case and Union All three times each For A1 A2,B1 B2,C1 C2 etc.

Answer 1

Using cross apply(values ...) and conditional aggregation:
select
v.X
, Jan = max(case when t.month=1 then v.Value end)
, Feb = max(case when t.month=2 then v.Value end)
, Mar = max(case when t.month=3 then v.Value end)
from t
cross apply(values
('A',convert(varchar(3),A1)+'/'+convert(varchar(3),A2))
,('B',convert(varchar(3),B1)+'/'+convert(varchar(3),B2))
,('C',convert(varchar(3),C1)+'/'+convert(varchar(3),C2))
) v (X,Value)
group by v.X
rextester demo: http://rextester.com/XICI74484
returns:
+---+---------+-------+-------+
| X | Jan | Feb | Mar |
+---+---------+-------+-------+
| A | 120/60 | 50/50 | 50/25 |
| B | 40/80 | 40/20 | 40/10 |
| C | 120/120 | 60/30 | 90/30 |
+---+---------+-------+-------+
For the evaluation of the expressions:
select
v.X
, Jan = max(case when t.month=1 then v.Value end)
, Feb = max(case when t.month=2 then v.Value end)
, Mar = max(case when t.month=3 then v.Value end)
from t
cross apply(values
('A',(A1*1.0)/A2)
,('B',(B1*1.0)/B2)
,('C',(C1*1.0)/C2)
) v (X,Value)
group by v.X
returns:
+---+------+------+------+
| X | Jan | Feb | Mar |
+---+------+------+------+
| A | 2.00 | 1.00 | 2.00 |
| B | 0.50 | 2.00 | 4.00 |
| C | 1.00 | 2.00 | 3.00 |
+---+------+------+------+

Answer 2

You can use XML. This snippet may be more than you want but it shows how
--------------------------------------------------
-----------------Begin TRANSPOSE-----------------
--------------------------------------------------
DECLARE #xml XML
,#RowCount BIGINT
DECLARE #sSQl NVARCHAR(MAX)= 'SELECT (SELECT DISTINCT ColumnName FROM #TempTable WHERE CellId=Cell.CellId) as ColumnName,'
---------------------------------------------------
--Set up #table Here or outside the code... but #TABLE WILL BE DROPPED AT FINISH
---------------------------------------------------
--#############################################################################
-- the temp table #Table will contain what you want to Transpose
--#############################################################################
--SELECT * INTO #Table FROM Widgets W WHERE WidgetId IN (1096,803)
---------------------------------------------------
---------------- End #Table Setup ---------------
---------------------------------------------------
SET #xml = (SELECT *
,ROW_NUMBER() OVER (ORDER BY (SELECT 1
)) Rn
FROM #Table Row
FOR
XML AUTO
,ROOT('Root')
,ELEMENTS XSINIL
);
WITH RC AS
(SELECT COUNT(Row.value('.', 'nvarchar(MAX)')) [RowCount]
FROM #xml.nodes('Root/Row') AS WTable(Row))
,c AS(
SELECT b.value('local-name(.)','nvarchar(max)') ColumnName,
b.value('.[not(#xsi:nil = "true")]','nvarchar(max)') Value,
b.value('../Rn[1]','nvarchar(max)') Rn,
ROW_NUMBER() OVER (PARTITION BY b.value('../Rn[1]','nvarchar(max)') ORDER BY (SELECT 1)) Cell
FROM
#xml.nodes('//Root/Row/*[local-name(.)!="Rn"]') a(b)
),Cols AS (
SELECT DISTINCT c.ColumnName,
c.Cell
FROM c
)
INSERT INTO #TempTable (CellId,RowID,Value,ColumnName)
SELECT Cell,Rn,Value,REPLACE(c.ColumnName,'_x0023_','#')
FROM c
SELECT #sSQL = #sSQl + '(SELECT T2.Value FROM #Temptable T2 WHERE T2.CellId=Cell.CellID AND T2.Rowid=' + CAST(T.RowId AS NVARCHAR) + ') AS __________________Value____________________'
+ CAST(T.RowID AS NVARCHAR) + ','
FROM (SELECT DISTINCT
RowId
FROM #TempTable
) T
SET #sSQl = LEFT(#sSQL, LEN(#sSQL) - 1) + ' FROM (SELECT DISTINCT CellId FROM #TempTable) Cell order by columnname'
EXECUTE sp_Executesql #sSQl
--here you will have your output
-- PRINT #sSQl
DROP TABLE #Table
DROP TABLE #TempTable
--------------------------------------------------
-----------------END TRANSPOSE-------------------
--------------------------------------------------