[mso] Re: Access - Matching
- From: "Glenda Wells" <gwells@xxxxxxxxxxx>
- To: <mso@xxxxxxxxxxxxx>
- Date: Mon, 15 Dec 2003 13:30:09 -0500
I thought there was a limit to the number of characters or fields one
could include in a concatenate but if you say it can be done, I'll try
it. Does this field need to be a memo field?
Let's say I make this "super field"...I have last week's table, then
this week's table, then do an unmatched query?
/g
P.S. I DO love Access, just wish I were smarter...or more educated. /g
-----Original Message-----
From: Ray Blake [mailto:ray@xxxxxxxxx]
Sent: Monday, December 15, 2003 01:15 PM
To: mso@xxxxxxxxxxxxx
Subject: [mso] Re: Access - Matching
Whenever the number of fields looks like it will slow you down, you can
always create a 'superfield' - a concatenation of a number of individual
fields into one long string. If all you're doing is comparing to
identify duplicates, this will work much faster than comparing each
field individually to find an exact match.
You can concatenate in this way in Access and Excel, so the fact you're
importing shouldn't be a problem.
Ray
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-----Original Message-----
From: mso-bounce@xxxxxxxxxxxxx [mailto:mso-bounce@xxxxxxxxxxxxx] On
Behalf Of Glenda Wells
Sent: 15 December 2003 18:00
To: mso@xxxxxxxxxxxxx
Subject: [mso] Re: Access - Matching
Hi Ray. I don't update the data, I import it. I was thinking along the
lines of some way to match fields in the new import against fields in
the previous import to eliminate identical records. The number of
fields probably exceeds the matching query thing (I think 10 is the
limit there). I don't think I can do an IIF statement either like if
all 25 fields match, "Y", otherwise "N" so all I'd have to do is work
with records with an N. I'm limited to what I'm familiar with so threw
the question out for some of you geniuses. Sorry I didn't give enough
detail the first time. /g
-----Original Message-----
From: Ray Blake [mailto:ray@xxxxxxxxx]
Sent: Monday, December 15, 2003 12:26 PM
To: mso@xxxxxxxxxxxxx
Subject: [mso] Re: Access - Matching
Glenda,
One thing you could do would be to add a field to the table definition
with a date/time format. Then get your entry form to write the NOW()
value to that field whenver a record is updated.
I'm assuming you're opening the whole table as a recordset. Instead, you
can use an SQL string just to load updated records into the recordset by
putting a WHERE satement in the SQL to only include records with
date/timestamps later than the last 'systemcheck' date and time.
Every time you run your routine, you can write a NOW() value to a
special table which overwrites the last 'systemcheck' date and time.
Ray
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