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Hi Shang ,
It seems you are adding that extract filter first and then you are trying to join the other table .
Please join your table first under live connection and once you are done with your joining tables ,change the connection type to extract and then use extract filter on the joined table .
This should work ,if not please try to add and attach sample data from your DB .
Oh thanks Verma, you are right, I was adding extract filter first and then trying to join other table. That's because the data size is so large that I cannot join table first and then set filter. If I did, Tableau would be no responding... but anyway, I will try your idea to add and attach sample data from my DB. Thanks for your help!