Compare rows in access table

Hi,

I have a access table which contains few rows.
I need to compare each row in the table with other rows in the same sheet.

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Logic:
If column "Key" contains different data in 2 rows then check column "Unit", If column "Unit" contains same data then check "Assembly",
If column "Assembly" in one row is empty and column "Assembly" in another row has data then copy the value of column "Effective_Date" (column "Assembly" has value) to column "Effective_Date" of the row which is empty in column "Assembly".

required output:

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Thanks in advance.

Any reason why you have posted the same question in the excel subforum and access?

Yes.

Currently I have the excel file.
In the later stage, the original excel file(without applying this logic) will be linked to access database and the same logic should be done in access.

Crossposted: http://www.mrexcel.com/forum/microso...ess-table.html

I'm afraid your post does not comply with Rule 8 of our Forum RULES. Do not crosspost your question on multiple forums without including links here to the other threads on other forums.

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I have posted the same question at
http://www.mrexcel.com/forum/microso...ess-table.html

Thanks.

I have written this code to update the table, runs with no errors, debuged to check if the values are assigned correctly, but the table is not updated.
Think I have missed something in the code to update.

here is my code:

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Thanks.