QlikView Reference Manual.pdf - QlikCommunity - QlikView

count({$} DISTINCT [Invoice Number])
This expression counts the distinct invoice numbers in the state based on the possible
invoice numbers available in State1.
It is almost, but not quite equivalent to the following expression:
count({$} DISTINCT [Invoice Number])
The difference between the expressions is that in the first one, the possible values on invoice number from
State1 are passed into the default state. In the second expression, the selected values from State1 are passed
into the default state. If the user has not made any invoice number selections in State1, no invoice number
values will be passed into the default state.
Set operators are best used within set modifiers. The following expression finds the intersection of the possible
invoice numbers from State1 and State2 and passes those values into the invoice numbers in the default
state.
Examples:
count({$} DIS-
TINCT [Invoice Number])
The expression to find the intersection of invoice numbers in the state and State1 is:
count({$} DISTINCT
[Invoice Number])
This expression may seem confusing because it uses a state ( in this instance) in both the element
function and a set identifier. Keep in mind that the element function p($) is returning the possible values in
the default state. The set/state identifier {$} is being modified by the result of the element functions. Any
invoice selections currently existing in the default state are being overridden by the values from the intersection
of the element functions.
It should be noted that the above expression is still not completely correct as it fails to synchronize the common
selections between the default state and State1. Below is an expression that will do so:
Examples:
count({$} DISTINCT [Invoice Number])
As before, the QlikView Developer can add fields into the modifier to keep selections consistent between
various states.
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