count TRACK NUMBER if POD_FLAG is not null - IN QLIK SENSE

[y_vandijk]

hello,

i have a table:

TRACK NUMBER	POD_FLAG
1234	-
5678	1
9012	0
3456	1
7890	-
2345	1

i want to count just the track numbers that have value in POD_FLAG

in this example the answer should be 4

what the condition i shuld write?

[tresesco]

Something like:

Count( {<[TRACK NUMBER]={"=Len(Trim([TRACK NUMBER]))>0"}>}[TRACK NUMBER])