Looping thru fields

misterqj · February 15th, 2005, 02:46 PM

I have a table that I am trying to update with a CSV file that I have linked into my Access database. The field names are the same in both locations, but they aren't in the same order, and I can't count on the order remaining the same each time I get the new CSV file.

What I would like to do is loop thru one table and update the field of the same name in the other table.
For example (I know this won't work, its just the general idea)

Code:

Dim fld As Field
Do While Not rs1.EOF
    For Each Field in rs1.Fields
        rs2.fld = rs1.fld
    Next
Loop

I also see this working in a situation where I only want certain fields from a database. I can create an array of field names and loop thru the field names, to get just the fields I want. In my situation, I am doing an update of an Access db from a CSV file provided by a national membership organization. I may not want all the fields they provide. Since I have to check the tables both ways for this system, I would only have to create my field lists one time, and loop thru the lists to compare/update values. It saves typing out 50 field names for each loop to compare/update.

I do this with perl/mysql all the time. Can it be done in VBA?

Thanks for any insight.

dartcoach · February 15th, 2005, 03:14 PM

QJ,

Is the CSV file a complete new file or just the updates?

Kevin

misterqj · February 15th, 2005, 03:33 PM

The CSV file is a completely new file each month. The national org doesn't just give us changes, so we have to go thru the CSV to add new members and modify existing members in the state db.

In addition, I have to go thru the CSV file to determine if members in the state db are no longer in the national db so I can mark them inactive for the state org to follow up with, and then make them active next month when they pay their dues.

I am beginning to understand why data synchronization can be such a PITA :)

dartcoach · February 15th, 2005, 04:19 PM

QJ,

Which field are you using for a Primary Key?
Does the CSV file come with field names in the first record?

Kevin

misterqj · February 15th, 2005, 04:30 PM

The primary key field is simply called id, and yes, the CSV has the field names in the first row.

dartcoach · February 15th, 2005, 05:00 PM

QJ,
Don't know if this would work.
import the new csv file into a new table. (Always Named the same)
create a relationship between the id in your table and id in the new table. (This table will be recreated each time you import the CSV file).

since the 2 tables are now related by the id field, the field order doesn't matter.

Create an update query to update the records from the csv table.
this query should execute right after the import is completed.
Your table, will be refreshed with the new data, but only the records that are in both tables. If they are in both, make sure it sets your table to active.

Create an unmatched query to check if you have records that aren't on the CSV table and set them to inactive.

Create an unmatched query to check if there are new records on the CSV that you don't have and insert them.

Don't know.

Kevin

dlamarche · February 18th, 2005, 07:54 PM

Good thinking dartcoach. As I was reading the posts, I was starting to develop a strategy and when I read your post it was all there except better said.

Daniel

dartcoach · February 18th, 2005, 08:35 PM

Daniel,

Thanks. Wasn't sure if it was clear.

dartcoach

misterqj · February 20th, 2005, 12:30 PM

I got pulled into a different project temporarily, and wasn't able to keep up on this thread.

I am going to try the query method you suggested, and see how it goes.

Thanks for the ideas.