Count based on a count condition - expression

[Bhargavgs]

I have the following table.

order_number
100
101
101
102
103
103
103
104
104

I'd like to create an expression which counts instances where order_number occurs only once. Example - 100 and 102 do not repeat, while 101, 103 and 104 have multiple instances. The expected result is 2.

I've tried count({<count(order_number)={1}>}order_number) but does not seem to work.

[vinieme12]

Dimension

=Order_Number

MEasure

=count({<Order_Number={"=count(Order_Number)=1"}>}Order_Number)

Refer this article

https://community.qlik.com/t5/Qlik-Design-Blog/The-Expression-Search/ba-p/1463907