Dynamic Pivot Sql Query display all from one table - sql

Question

TABLE-A:-
Custno
Name
Route
Phone
1
C1
1
12345
2
C2
1
23456
3
C3
2
34567
4
C4
1
45678
5
C5
1
56789
TABLE-B:-
ODate
Custno
Route
ProductId
qty
2021-04-22
1
1
1
100
2021-04-22
1
1
3
200
2021-04-22
2
1
1
120
Table-C
ProductId
BrandName
1
Brand-1
2
Brand-2
3
Brand-3
EXPECTED RESULT
Phone
CustNo
Name
Brand-1
Brand-2
Brand-3
12345
1
C1
100
200
23456
2
C2
120
45678
4
C4
56789
5
C5
What I tried Using Dynamic Pivot
DECLARE #query AS VARCHAR(MAX)
, #cols_ AS vARCHAR(MAX)
--Making the column list dynamically
select #cols_ = STUFF((SELECT ',' + QUOTENAME(brandname) from [Table-C] order by productid FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'')
print #cols_
--preparing PIVOT query dynamically.
SET #query = ' SELECT
pivoted.*
into #Temp_data
FROM
(
select a.phone,a.custno,a.[name],d.BrandName,c.qty from [Table-A] a inner join [Table-B] c on a.custno = c.custno inner join [Table-C] d on c.productid = d.Productid and a.Route='1' and c.odate='2021-04-22'
) AS [p]
PIVOT
(
MIN([P].[qty])
FOR [P].[BrandName] IN (' + #cols_ + ')
) AS pivoted
order by custno;
select *
from #Temp_data [B]
-- GROUP BY [B].[ODate]
drop table #Temp_data
';
EXEC (#query)

Answer 1

You can reconstruct the query
SELECT *
FROM
(
SELECT A.[Phone], A.[CustNo], A.[Name], C.[BrandName], B.[qty]
FROM [Table-A] AS A
LEFT JOIN [Table-B] AS B
ON A.[CustNo] = B.[CustNo]
AND B.[odate] = '2021-04-22'
LEFT JOIN [Table-C] AS C on C.productid = B.Productid
WHERE A.[Route] = 1
) t
PIVOT
(
MIN([qty]) FOR [BrandName] IN ([Brand-1],[Brand-2],[Brand-3])
) AS piv
which contains LEFT JOIN rather than INNER JOIN, and STRING_AGG() function in order to generate the pivoted columns dynamically as in the following code block
DECLARE #cols AS NVARCHAR(MAX), #query AS NVARCHAR(MAX)
SET #cols = ( SELECT STRING_AGG(QUOTENAME([BrandName]),',')
FROM (SELECT DISTINCT [BrandName]
FROM [Table-C] ) C );
SET #query =
N'SELECT *
FROM
(
SELECT A.[Phone], A.[CustNo], A.[Name], C.[BrandName], B.[qty]
FROM [Table-A] AS A
LEFT JOIN [Table-B] AS B
ON A.[CustNo] = B.[CustNo]
AND B.[odate] = ''2021-04-22''
LEFT JOIN [Table-C] AS C on C.productid = B.Productid
WHERE A.[Route] = 1
) t
PIVOT
(
MIN([qty]) FOR [BrandName] IN (' + #cols + N')
) AS piv'
EXEC sp_executesql #query;
Demo