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SQL query Interface design

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Message        JackieMiller          Post subject: SQL query Interface 
designPosted: Sun Jun 13, 2010 12:09 pm                         
Joined: Thu Dec 17, 2009 3:49 pm
Posts: 48                The Orders Database example demonstrates a "SINGLE" 
search criteria line on each tab that lets a user create a "SINGLE" SQL query 
statement. It uses 4 fields.

My question...
If I wanted to give the user the opportunity to have more than a "SINGLE" SQL 
query statement, I would want to add a 5th field at the end of the line 
(probably a button of some type with maybe a plus sign in it) so that the user 
could click it and that would cause a second line of these 5 fields to appear 
just underneath, perhaps pushing fields below down further or maybe growing the 
entire window a little bit or something like that.

Now, it seems to me that taking these 5 fields/buttons and placing them in a 
Container Control would be an excellent fit. 

Does anyone know of a problem going this route?

In addition, what is the easiest way to have a second instance of the container 
control appear underneath ( and this would need to allow a 3rd and 4th as well.)

I could just put 4 instances on the screen during design, make 3 hidden, then 
when they click the "plus" button, make the next one visible (of course, moving 
the objects below down just a little bit). This way, I could limit the SQL 
query to just 4 (and I would be OK with that).

Looking for best programming practice (OSX and Windoz implementations).   
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