How do I count for something that has not already been used in a cell from a multi cell dropdown?

jerry123
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Hi all,
I need help!
From this list of machines, I would like to know which machines are available on a particular day..
I have a date column on my sheet.
How would I solve this?
Much appreciated!! Thank you!
Answers
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Do you have a separate list of machines (it could even be in your sheet on a hidden column...)?
If not, then create one.
then:
- Create Multi-Dropdown Field called 'Used Machines'. should have column formula: =JOIN(COLLECT([Sinker Machine]:[Sinker Machine], Date:Date, Date@row), CHAR(10))
- Create Multi-Dropdown Field called 'Available Machines'. should have column formula: =JOIN(COLLECT({reference to machine list}, {reference to machine list}, AND(@cell <> "", NOT(HAS([Used Machines]@row, @cell)))), CHAR(10))
When you enter a new row and put in a Date the available machines column will populate
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@Leibel S That worked! Thank you so much!! :)
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