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Combo Box to display ID's used only

Posted on 2012-03-12
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Last Modified: 2012-03-12
I am trying to create a combo box that will only display the ID's that have been used on the master table. I have one table called customer type that gives a unique key and description for customer types. When the master table is populated with customers the users choose from a drop down list that is populated with the unique ID and description from the Customer Type table.

Now I am in the process of creating a multi-parameter query that will display customers based on what the user chooses from multiple combo boxes on a form. The challenge I am running into is there are some customer types that have not been used yet. I need that customer type combo box to only show the ones that have been used on the master table, not all of them from the Customer Type table.

I have searched and searched this board, in fact I have spent the last couple hours doing so, trying to find my answer and keep coming up empty. It is probably in how I am doing my search of the board, but I have tried several combinations of words and still cannot seem to find the answer. I know it is probably something simple but it is costing me a lot of time to find it.

Thanks,
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Question by:caseyu
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8 Comments
 

Expert Comment

by:gnetgnet
ID: 37711379
Can you share the query and the tables layouts?
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Expert Comment

by:gnetgnet
ID: 37711389
If your query has a join between the 2 tables,  only the ones that are on both will be included
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LVL 42

Assisted Solution

by:dqmq
dqmq earned 125 total points
ID: 37711398
Make the rowsource for your combobox like this:

Select t.* from CustomerType as T inner join MasterTable as M on M.CustomerTypeID = t.CustomerTypeID


Of course, you need to substitute your table and column names
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Author Comment

by:caseyu
ID: 37711445
I have been accused of this before and a lot of the time it is true since I am not always 100% sure how to ask for what I want, but I might not have been very clear. On the combo box for the multi parameter query, I only want the Customer Type (cTypeID) to show up once if it exists on the Master table. Below is the copy of the code that I entered in the row source. I got it to give me a list but it is giving me the cTypeID for every customer that is in the master table, not limiting it to 1 if it exists on the table.
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Author Comment

by:caseyu
ID: 37711450
SELECT t.* FROM tblTypes AS T INNER JOIN tblContact_Primary AS M ON M.cTypeID = t.cTypeID;
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Expert Comment

by:gnetgnet
ID: 37711496
try select distinct only selecting Cust type, not *
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Accepted Solution

by:
gnetgnet earned 125 total points
ID: 37711598
SELECT DISTINCT t.cTypeID FROM tblTypes AS T INNER JOIN tblContact_Primary AS M ON M.cTypeID =  t.cTypeID;
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Author Comment

by:caseyu
ID: 37711646
GNET got me the final answer but both helped out so I am splitting the points.
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