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multiple dropdowns from one diminishing value list

Question asked by symbister on Jun 23, 2013
Latest reply on Jun 25, 2013 by philmodjunk

Title

multiple dropdowns from one diminishing value list

Post

     Hi again

     Building a theatre performance database with multiple Productions with multiple Performances...each Performance can have a different price structure, say:

     Perf A:
     Full price is $20.00 (Discount A)
     Concession is $16.00 (Discount B)
     Member is $15.00 (Discount C)

     Perf B:
     Full is $17.50 (Disc A)
     Conc is $12.00 (Disc B)
     Group is $10.00 (Disc C) ....etc

     up to about 10 unique price codes (A thru K) per Performance, so I have a Performances layout with a Discount portal where the user can select the ten discount codes, and add the prices, starting with Discount A, with a drop down of the possible 30 discount codes, then select a Discount B from the discount codes, but now that list has been reduced to 29, as one has been chosen...

     how can I achieve this - I've got a Discount Table with up to ten discount records for each performance, but need a diminishing value list each time one is selected.... and how do I set a value to set up the relationship ?

     WIP screenshot - for obvious reasons the user can't be allowed to enter two discounts with the same code

     any help - as ever - appreciated

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