Insert distinct values into table with IDs - sql-server

Question

Let's say I have the following table:
camp_1, camp_2
0, 048
00, 048
000, 042
000, 043
I now want to insert these values into a new table dim_promotion, which should look like this:
PromotionID, CampaignID, CouponID
1, 1, 1
2, 2, 1,
3, 3, 2,
4, 3, 3
I know how I can fill the tables (dim_campaigns and dim_coupons which stand behind CampaignID and CouponID) by doing this:
INSERT INTO [REPORTING].dbo.dim_campaigns
SELECT DISTINCT
camp_2 AS CampaignID
FROM [reporting2].[dbo].[reporting_rawdata_v2]
The primary keys for the respective three tables (dim_coupons, dim_campaigns and dim_promotion) are all set to "Identity Specification = YES"
So how do I then fill dim_promotion? What is the natural order? FIrst derive dim_campaigns and dim_coupons and then isnert this into dim_promotion or the other way round?
EDIT: I have the following DB model (only an excerpt) I am only referring to the yellow fields.
RIght now, we have only large table (rawdatatbl) where all data is stored (CampaignCode, CouponCode, Campaign Name, CouponName). This is not really efficient and that's why I want to compeltely restructure the model (see the screenshot). So, as currently the data does not consist of any IDs at all, I do need IDs to fill the new tables dim_campaigns and dim_coupons. This means: To fill dim_campaigns I would run a SELECT DISTINCT campaign_code on my current rawdatatbl and then Insert this into dim_campaigns (CampaignID is automatically filled by using auto_increment and CampaignName is filled with 'Dummy'). The same I could do for dim_coupons. But how can I then use this data to initialize the Dim_promotion table? Or what is the best process to transform my current data from rawdatatbl into IDs?

Answer 1

one possible way is :-
---- insert your all distinct Campaign data
Insert Into dim_campaigns(CampaignCode,CampaignName)
Select Distinct
cm.CampaignCode
,cm.CampaignName
From rawdatatbl As cm
---- insert your all distinct Coupon data
Insert Into dim_coupons(CouponCode,CouponName)
Select Distinct
c.CouponCode
,c.CouponName
From rawdatatbl As c
Declare #Total Int
,#Inc Int
,#RowId Int
,#CampaignCode Varchar(100)
,#CouponCode Varchar(100)
----Primary keys
,#CampaignId Int
,#CouponId Int
,#PromotionID Int
Select #CampaignCode = ''
,#CouponCode = ''
----loop through one by one and take necessary action
Select #Total = Count(1)
,#Inc = 0
,#RowId = 0
From rawdatatbl As c With (Nolock)
While (#Inc < #Total)
Begin
Select Top 1
#RowId = [TableUniqueId]
,#CampaignCode = c.CampaignCode
,#CouponCode = c.CouponCode
---- others columns
From rawdatatbl As c
Where [TableUniqueId] > #RowId
Order By [TableUniqueId] Asc
Select #CampaignId = dc.CampaignId
From dim_campaigns As dc
Where dc.CampaignCode = #CampaignCode
Select #CouponId = dc.CouponId
From dim_coupons As dc
Where dc.CouponCode = #CouponCode
If (#CampaignId > 0 And #CouponId > 0)
Begin
Insert Into dim_promotion(CampaignID,CouponID)
Select #CampaignId,#CouponId
Select #PromotionID = ##Identity
---- other operation insert/update based on #PromotionID you can do here.
End
Select #Inc = #Inc + 1
,#CampaignCode = ''
,#CouponCode = ''
,#CampaignId = 0
,#CouponId = 0
End