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Nested For Each

Hi,

I'm not sure if is possible in SSIS but I have 2 DataSet's and I would like to do a nested loop.

Therefore:

For Each Row in DataSet1 (loop through each header)
          For Each Row in DataSet2 (loop through the details that are equal to the header)

To help you understand DataSet1 is the Headers and DataSet2 is the Details.  Additionally the Header Rows are each numbered and the Detail Rows have the unique header row number in them.

I know I can do this in Scripting tasks but I just wondered if there was a proper/elegant way of doing it in SSIS.

Any help greatly appreciated.

Mike
0
hydev
Asked:
hydev
2 Solutions
 
raulggonzalezCommented:
Why not create 1 dataset with all the rows?


And you can loop just once.


hope it helps.


Cheers
SELECT * 
FROM Headers AS H
LEFT JOIN Details AS D
ON D.headerID = H.ID

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EvilPostItCommented:
If you are not using a SQL data source and are in fact importing from files etc then you have the following options.

1)   Yes you can do a nested loop although you will have to do it using variables. Also this will be row based and could take longer if there a many rows.
2)   You may be able to get the results you are after by doing this in a data flow task using the merge or merge join transformations.

It really depends on what you want to do. For example you have not specified if you want to perform and action for each rows.

If you could give a bit more detail as far what you want the entire package to do i should be able to give a more precise answer.
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deightonCommented:
if this is .net datatables and datasets then you can set up and use data relations to return all the child rows for a parent
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hydevAuthor Commented:
You have both given me ideas to possible solutions so thanks.  
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