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Filtering dates taking too long

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Hi,

 

I have a table with more than 18 million records. I am bringing it into alteryx using input tool and then changing date from string data type to date in order to filter to get todays date minus 15. I used the datediff function to create datediff filed and got date difference for my date with todays date. All works fine until now but as soon as I apply filter to get data with datediff < 15 it starts to take time. Is it possible to do something using indatabase tools ( i have tried but datetime parse or any other tools dont work with the in database tools) or anything else?

 

Please let me know what can be done. Thanks,MoHammad.


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