Read/Write Queries, Multiple Joins...

Jun 30, 2005

Okay, take three tables.

AreaTable
AreaID
AreaName
Percent

GangTable
GangID
Area_ID
Speed

MasterTable
MasterID
Station
Description
Area_ID

The Relationships

AreaTable.AreaID 1---------> (inf) GangTable.Area_ID
AreaTable.AreaID 1---------> (inf) MasterTable.Area_ID


Initially the query below used Inner Joins, however that limits my list, when i want to see ALL elements from the MasterTable no matter what, thus my inner joins became left and right joins as follows.

Simple Query: Query1

SELECT MasterTable.Station, MasterStable.Description, MasterTable.Area, AreaTable.Percent, GangTable.GangID, GangTable.Speed
FROM (AreaTable RIGHT JOIN MasterTable ON AreaTable.AreaID = MasterTable.Area_ID) LEFT JOIN GangTable ON AreaTable.AreaID = GangTable.Area_ID;


This should simply display All Records in MasterTable, (Multiple Times if Necessary) listing all the elements of AreaTable that are Linked to the MasterTable, and all elements from GangTable that are linked to AreaTable. It does this, and displays them nicely. But I can't edit the fields. I get the result:

1 | Station One | Area 1 | 45% | 204 | 1000
1 | Station One | Area 1 | 45% | 304 | 500
1 | Station One | Area 1 | 45% | 404 | 750
2 | Station Two | Area 1 | 45% | 204 | 1000
2 | Station Two | Area 1 | 45% | 304 | 500
2 | Station Two | Area 1 | 45% | 404 | 750
3 | Station Three | Area 2 | 75% | 254 | 800
3 | Station Three | Area 2 | 75% | 354 | 600
3 | Station Three | Area 2 | 75% | 454 | 700


So you can see that Area 1 has multiple Gangs (204,304,404) and Multiple Stations (1,2). If you do a simple set up like this, you'll find that you can't change the Description field (Rename "Station One" to "Hello World"). It just doesn't work, no matter which way I've tried, I can't seem to make a Query that presents all the information from MasterTable and All the Information IN AreaTable and All the Information in GangTable which will allow me to also edit the fields.

Any Help would be most appreciative, I'm tearing my hair out on this one.
Thanks,
Jaeden "Sifo Dyas" al'Raec Ruiner

ps - It just seems that with Junction Tables and all the many to many relationship designs I have tried, you'd be able to change the non-related fields. I understand that you can't change the "ID" fields, but the others should be editable.

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