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How to filter to see only data in a data set not matching with data in another data set

Summary
How to filter to see only data in a data set not matching with data in another data set
Content
Hi,
I am trying to create a simple project to show me what are the cities without population.
I have 2 data sets: one with 2 columns (city name, population no) and one with 1 column (city to find population).
Data set 1:
City A | Population A |
Madrid | 30k |
Paris | 100k |
Bucharest | 20k |
Sofia | 10k |
Data set 2:
City B |
Paris |
Bucharest |
Moscow |
Madrid |
Sofia |
Istanbul |
How can I see in a project that I don't have a population for 2 cities (Moscow and Istanbul)? As you can see in the picture link below there is blanks on the rows with cities not found but how can I make DV to show only those 2 rows not all 6?
Picture with the project here: https://ibb.co/e1kBDb
Thank you,
Adrian
Answers
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I have 2 data sets already. I need to show only the 2 cities without population.
If I use a filter I get all as blanks. See picture ... https://ibb.co/nuEN66
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You haven't provide a whole lot to go on, but if you're looking to create a new data source with just the cites missing population, take a look at Data Flows. Otherwise, I would think you could just use filters.
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Try making your population column a measure instead of an attribute.
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