looking for way show all unique code based on day index

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I want to show how many unique characters on that day based on a day in one column, for example, on day 01 we have code DC13850-DC13873 , when I input the formula with day 01 I want all codes in that day to show, and also when I change the day all the code also change based on the selected day :

day Code
01  DC13850
01  DC13851
01  DC13852
02  DC13853
02  DC13854
02  DC13855
03  DC13856
03  DC13857
03  DC13858

I've been struggling with it, can anyone help me?

data example

1 Answers

try:

=UNIQUE(FILTER(E:E; D:D="01"))
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