Complex copy routine, mulitple tables and changing GUIDs

hello,

I have several tables that have guids as their primary keys and the tables are related as follows:

Table1 - primary key =ServiceNo (Guid), Filter Key =CampaignNo

Table2 - primary key = CostBasisNo (Guid), Foreign Key =ServiceNo (from Table1)

Table3 - primary key = UserId, Foreign Key =ServiceNo (from table1)

Table4 - primary key = SourceServiceNo (Foreign Key from Table1), MemberServiceNo(Foreign Key from Table1)

what I need to do is copy all records from Table1 where CampaignNo = @.CampaignNo and insert them into table1, this I can do easily but I will generate a new ServiceNo for each one and associated a new CampaigNo which is fine.

The problem comes in that I need to also copy the contents of Table2 = Table3 for all ServiceNos that have been copied from Table1 but insert the new Guid that will have been created when copying the rows in Table1

This is further compounded when I need to do the same to Table4 but this time I need to insert the newid's forSourceServiceNo and the relatedMemberServiceNo which all would have changed.

I haven't the first clue where to start with this task, do I need to use temporary tables, cursors? any help gratefully received, even if it's a pointer to the most efficient approach.

regards

DECLARE @.newCampaignNo uniqueidentifier

SELECT @.newCampaignNo=newid()

INSERT INTO Table1 (CampaignNo) -- and other columns as well, I guess
SELECT @.newCampaignNo FROM Table1 WHERE ServiceNo=@.oldCampaignNo

INSERT INTO Table2 (ServiceNo) -- and other columns as well, I guess
SELECT ServiceNo FROM Table1 WHERE CampaignNo=@.newCampaignNo

INSERT INTO Table3 (ServiceNo) -- and other columns as well, I guess
SELECT ServiceNo FROM Table1 WHERE CampaignNo=@.newCampaignNo

I suppose table4 will be quite easy as well, but you need to describe where the ServiceNo:s come from.

|||

Hi gunteman,

thank you for replying, I'm not sure that will do what I want.

In my db the CampaignNo will never equal the ServiceNo.

Maybe if I try and explain the problem another way and only use two related tables

Lets say I have:

Table1 where the primary key =ServiceNo, and other attributes including anon primary key = CampaignNo

My first task is to copy all the rows from Table1 where an input parameter called @.CampaignNo = CampaignNo,

So my statement would be something like:

INSERT INTO Table1 (ServiceNo, attribute1, attribute2,CampaignNo)
(SELECTNEWID(), attribute1, attribute2, @.CampaignNo from Table1 WHERE
CampaignNo = @.CampaignNo)

NEWID() of course will create a new uniqueidentifier.

now this works fine, I've tried this out using a temporary table and all is good.

my problem comes when I need to copy the contents of the related table, say Table2,

Lets say Table2 hasCostBasisNo (primary key), attribute1, attribute2,ServiceNo (foreign key from Table1)

now I need to copy rows from Table2 but where the ServiceNo = the old ServiceNo from Table1 and I guess this is where the list of service numbers again = @.CampaignNo.

I guess I could say something like

INSERT INTO Table2 (CostBasisNo, attribute1, attribute2, ServiceNo)
(SELECTNEWID(), attribute1, attribute2, ServiceNo from Table2 WHERE
?)

and this is where I hit the problem, how do I write the INSERT statement for Table2 to copy it's own records but only where the ServiceNo = the old ServiceNo from Table1 and then insert the associated new ServiceNo.

hope that's made the issue a little clearer, the other tables don't really matter cos if I can solve this the others will follow.

regards

|||DECLARE @.newCampaignNo uniqueidentifier

SELECT @.newCampaignNo=newid()

DECLARE @.conversion TABLE
(
oldServiceNo uniqueidentifier,
newServiceNo uniqueidentifier
)

INSERT INTO @.conversion (oldServiceNo,newServiceNo)
SELECT ServiceNo,newid() FROM Table1 WHERE CampaignNo=@.oldCampaignNo

INSERT INTO Table1 (ServiceNo,attribute1, attribute2, CampaignNo)
SELECT newServiceNo, attribute1, attribute2, @.newCampaignNo FROM @.conversion c,Table1 t WHERE c.oldServiceNo=t.ServiceNo

INSERT INTO Table2 (CostBasisNo, attribute1, attribute2,ServiceNo)
SELECT newid(), attribute1, attribute2, newServiceNo FROM Table1 @.conversion c,Table2 t WHERE c.oldServiceNo=t.ServiceNo

..and so on.|||

Yes, that does the job very nicely indeed - thank you, it's also given me a pointer to other tables I need to copy the contents of.

nice one!