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Query to update fields with data from table rows above with the same dwelling type

AndyC1000 asked
Last Modified: 2015-12-07
Dear all,

I posted a similar question a while ago see the link below.  The vb code populates the record where all values are 0 with the populated record above.  The issue is now I need to check the dwelling type of the record with all 0's and populate with the record above with the same dwelling type.  I'm unsure of how to make this change.  I'm happy with the vb solution although if there is another approach I would also be interested.


I've created two tables below with the original dataset and the new results I'm trying to achieve.  The dwelling types aren't grouped so the code might need to search many records above before it finds the correct dwelling type.   The  HCFMDCode is updated to B when a change is made.

The original table looks like this:

ID      DwellingType Couple      Family        Other            HCFMDCode
1           House            0.433          0.567           0                    A
2            House            0.223          0.388           0.388             A
3           House            0                  0                  0                    A
4           House            0                  0                  0                    A
5            Unit                0.355          0.332           0.332             A
6            Unit                0                  0                  0                    A

The final results should produce:
ID      DwellingType Couple      Family        Other            HCFMDCode
1           House            0.433          0.567           0                    A
2            House            0.223          0.388           0.388             A
3           House            0.223          0.388           0.388             B
4           House            0.223          0.388           0.388             B
5            Unit                0.355          0.332           0.332             B
6            Unit               0.355          0.332           0.332              B

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