Stored Procedure (T-SQL) Join multiple tables - sql

Question

I'm currently working on a t-sql query in Microsoft SQL Server Management Studio (SQL Server), which should gather data over several tables. In the end I'll need [OfferId] and [Label]. Do you have an idea on how to write those 4 query statements into 1?
SELECT a.OfferId AS [OfferId], a.OfferDataId AS [OfferDataId], b.DeliveryModelPoolId AS [DeliveryModelPoolId]
FROM [Offer].[Offer] a
INNER JOIN [Offer].[OfferData] b
ON a.OfferDataId = b.OfferDataId
OfferId | OfferDataId | DeliveryModelPoolId
1..........| 1..................| 4
SELECT a.DeliveryModelPoolId AS [DeliveryModelPoolId], b.PoolId AS [PoolId]
FROM [Offer].[OfferData] a
INNER JOIN [Offer].[Pool] b
ON a.DeliveryModelPoolId = b.PoolId
DeliveryModelPoolId | PoolId
4................................| 4
SELECT a.DeliveryModelId AS [DeliveryModelId]
FROM [Offer].[Delivery] a
INNER JOIN [Offer].[Pool] b
ON a.DeliveryModelPoolId = b.PoolId
DeliveryModelId
2
6
SELECT a.Label AS [Label]
FROM [Offer].[DeliveryModel] a
INNER JOIN [Offer].[DeliveryLabels] b
ON a.DeliveryModelId = b.DeliveryModelId
Label
Service Center
Delivery By Car
Thanks a lot! :)

Answer 1

If you are planning to reuse the query, I would put it into a view:
CREATE VIEW vWOfferData
AS
SELECT a.offerID, dl.label
FROM [Offer].[Offer] a
INNER JOIN [Offer].[OfferData] b
ON a.OfferDataId = b.OfferDataId
INNER JOIN [Offer].[Pool] p2
ON b.DeliveryModelPoolId = p2.PoolId
INNER JOIN [Offer].[Delivery] d3
ON d3.DeliveryModelPoolId = p2.PoolId
INNER JOIN [Offer].[DeliveryModel] dl
ON dl.DeliveryModelId = d3.DeliveryModelId
You can then use it as a table. For example:
SELECT * FROM vWOfferData

Answer 2

You can join more than once in a query
select a.offerID, dl.label
FROM [Offer].[Offer] a
INNER JOIN [Offer].[OfferData] b
ON a.OfferDataId = b.OfferDataId
inner join [Offer].[Pool] p2
ON b.DeliveryModelPoolId = p2.PoolId
inner join [Offer].[Delivery] d3
ON d3.DeliveryModelPoolId = p2.PoolId
inner join [Offer].[DeliveryModel] dl
on dl.DeliveryModelId = d3.DeliveryModelId