Multiple subquery join in View with group by returns duplicate rows - sql

Question

I have created a view using subquery but I want this view to return few mendatory column which cant be added in group by subquery, so I have to create one more select statement and join with other group by subquery
I am come up with following query,
But problem I am facing is if group by seller has 28 rows it returns 28 duplicate rows, also I want whole query to order by TotalOrderItem.
Alter VIEW [dbo].[SellersPerformance] AS
Select
RequiredColumns.Id as Id,
aggrgateDT.SellerId as SellerId,
aggrgateDT.TenantId as TenantId,
aggrgateDT.Active as Active,
aggrgateDT.TotalOrderedItem as TotalOrderItem,
aggrgateDT.MoveToPurchase as MoveToPurchase,
aggrgateDT.GoodPurchase as GoodPurchase,
RequiredColumns.Created as Created,
RequiredColumns.Modified as Modified,
RequiredColumns.CreatorId as CreatorId,
RequiredColumns.ModifierId as ModifierId
From
(
(Select
sellerId, p.TenantId, p.Active, count(*) as TotalOrderedItem,
count(*) - count(o.Id) as MoveToPurchase,
count(o.Id) as GoodPurchase,
count(case when o.ApplicationStatus = 'Perfect' then 1 end) as Perfect,
count(case when o.ApplicationStatus = 'R-Perfect' then 1 end) as R_Perfect
FROM [dbo].[AmazonOrderPurchaseInfo] p
left join [dbo].[AmazonOrder] o
on p.AmazonOrderId = o.Id
AND p.Id = o.[AmazonOrderPurchaseInfoId]
group by SellerId, p.TenantId, p.Active
order by TotalOrderedItem offset 0 rows
) aggrgateDT
Left outer Join (
SELECT
NEWID() Id,
purchase.Created AS Created,
purchase.Modified AS Modified,
purchase.CreatorId AS CreatorId,
purchase.ModifierId AS ModifierId,
purchase.SellerId As SellerId
From dbo.AmazonOrderPurchaseInfo purchase
) RequiredColumns ON aggrgateDT.SellerId = RequiredColumns.SellerId
)
GO

Answer 1

You may try Group by for this.
Alter VIEW [dbo].[SellersPerformance] AS
select res.Id, res.SellerId, res.TenandId, res.Active, res.TotalOrderItem, res.MovetoPurchase, res.GoodPurchase, res.Created, res.Modified, res.CreatorId, res.ModifierId
from
(
Select
RequiredColumns.Id as Id,
aggrgateDT.SellerId as SellerId,
aggrgateDT.TenantId as TenantId,
aggrgateDT.Active as Active,
aggrgateDT.TotalOrderedItem as TotalOrderItem,
aggrgateDT.MoveToPurchase as MoveToPurchase,
aggrgateDT.GoodPurchase as GoodPurchase,
RequiredColumns.Created as Created,
RequiredColumns.Modified as Modified,
RequiredColumns.CreatorId as CreatorId,
RequiredColumns.ModifierId as ModifierId
From
(
(Select
sellerId, p.TenantId, p.Active, count(*) as TotalOrderedItem,
count(*) - count(o.Id) as MoveToPurchase,
count(o.Id) as GoodPurchase,
count(case when o.ApplicationStatus = 'Perfect' then 1 end) as Perfect,
count(case when o.ApplicationStatus = 'R-Perfect' then 1 end) as R_Perfect
FROM [dbo].[AmazonOrderPurchaseInfo] p
left join [dbo].[AmazonOrder] o
on p.AmazonOrderId = o.Id
AND p.Id = o.[AmazonOrderPurchaseInfoId]
group by SellerId, p.TenantId, p.Active
order by TotalOrderedItem offset 0 rows
) aggrgateDT
Left outer Join (
SELECT
NEWID() Id,
purchase.Created AS Created,
purchase.Modified AS Modified,
purchase.CreatorId AS CreatorId,
purchase.ModifierId AS ModifierId,
purchase.SellerId As SellerId
From dbo.AmazonOrderPurchaseInfo purchase
) RequiredColumns ON aggrgateDT.SellerId = RequiredColumns.SellerId
) as res
group by res.Id, res.SellerId, res.TenandId, res.Active, res.TotalOrderItem, res.MovetoPurchase, res.GoodPurchase, res.Created, res.Modified, res.CreatorId, res.ModifierId
)
GO
Here if Id, Created, Modified, CreatorId, ModifierId columns will have same id then you may get your expected result.