Thread: Simple Access Help.. null values
September 1st, 2005, 12:59 PM #1
- Join Date
- Sep 2005
Simple Access Help.. null values
Sorry if I'm repeating other questions, I searched your boards and didn't come up with anything.
I have (what I think) is a pretty simple question...
In Access.. I'm trying to query from two tables at once.
Example: TableNames and TableCity
Not all records listed in TableNames are accounted for in TableCity.
Say Names has 100 records, and City only has 50. Is there a way to query both, and have the City show up as null/blank if there is no association with the Names table?
Please let me know if you have the time. Thanks!!
September 1st, 2005, 01:36 PM #2
Welcome to the TechIMO forums.
Are the TNames and TCity tables part of the same database or different databases? If part of the same database, then this may be a case of "over normalization". When storage space was at a premium, very fine normalization might have been justified. That is no longer the case.
. How do the records in TNames relate to the records in TCity, or is there no detectable relationship? If there is some sort of relationship, create a linking table based on the relationship.
. Perhaps the data entry forms or scripts were not designed correctly. If there is a relationship, the data entry method should have included that - with the City table as a lookup or something when entering the info into the Names table.
Last edited by zepper; September 1st, 2005 at 01:52 PM."Our freedom depends on five boxes: soap, ballot, jury, witness; and, when all else fails, Ammo. " ?author?
September 1st, 2005, 01:49 PM #3
- Join Date
- Sep 2005
Here's the short story..
I have a large database with a bunch of people in it.. and each individual is assigned a NameID.
There are a bunch of other tables too.. using TCity as an example.. in there is a list of Citys, and each is assigned a CityID.
The main table has a field for CityID, which is related to the TCity table.
I can query the main table for the "CityID", but that just spits out a bunch of unusable numbers. The actual names of the cities which relate to the ID are in the TCity table, and when I use that to query the names it limits the outcome to only the individuals in the TCity table.
(in the names table)
If I query using both the tables (So I can see "New York" as opposed to 4353456).. all I get are the first two names because there is no value associated with Sue.
I hope I made sense. Thanks for the quick reply!!!
September 1st, 2005, 06:42 PM #4
If value="" (null) then use "Not Available".
You get the idea, but you'll have to find out the way Access does it. There are forums out there specifically for Access and I think a specific section on the Tek-Tips site.
.bh."Our freedom depends on five boxes: soap, ballot, jury, witness; and, when all else fails, Ammo. " ?author?
September 2nd, 2005, 03:41 AM #5Originally Posted by Roccapriore
"SELECT a.Name, b.CityID
FROM TableNames a
LEFT JOIN TableCities b
ON a.CityID = b.CityID"
hope this helps.keep 'em comin...
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