Loading dated files in Tableau












1














I started to use Tableau Desktop as a tool to visualise my data.
However, my data is stored in CSV files with a date format name (e.g. datasample_yyyymmdd.csv). I need to be able to load in my files as the date is changing every day.
How do I do this in Tableau?



I searched on Google for answers, but nothing clear.






csv load tableau tableau-public







share|improve this question






















  • Do you need your files aggregated for each new day or do you only want the most recent?
    – vizyourdata
    Nov 12 '18 at 17:22












  • @vizyourdata I want to use the most recent one.
    – ECode
    Nov 12 '18 at 17:35
















1














I started to use Tableau Desktop as a tool to visualise my data.
However, my data is stored in CSV files with a date format name (e.g. datasample_yyyymmdd.csv). I need to be able to load in my files as the date is changing every day.
How do I do this in Tableau?



I searched on Google for answers, but nothing clear.






csv load tableau tableau-public







share|improve this question






















  • Do you need your files aggregated for each new day or do you only want the most recent?
    – vizyourdata
    Nov 12 '18 at 17:22












  • @vizyourdata I want to use the most recent one.
    – ECode
    Nov 12 '18 at 17:35














1












1








1







I started to use Tableau Desktop as a tool to visualise my data.
However, my data is stored in CSV files with a date format name (e.g. datasample_yyyymmdd.csv). I need to be able to load in my files as the date is changing every day.
How do I do this in Tableau?



I searched on Google for answers, but nothing clear.






csv load tableau tableau-public







share|improve this question













I started to use Tableau Desktop as a tool to visualise my data.
However, my data is stored in CSV files with a date format name (e.g. datasample_yyyymmdd.csv). I need to be able to load in my files as the date is changing every day.
How do I do this in Tableau?



I searched on Google for answers, but nothing clear.






csv load tableau tableau-public




csv load tableau tableau-public






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 12 '18 at 15:06









ECode

4518




4518












  • Do you need your files aggregated for each new day or do you only want the most recent?
    – vizyourdata
    Nov 12 '18 at 17:22












  • @vizyourdata I want to use the most recent one.
    – ECode
    Nov 12 '18 at 17:35


















  • Do you need your files aggregated for each new day or do you only want the most recent?
    – vizyourdata
    Nov 12 '18 at 17:22












  • @vizyourdata I want to use the most recent one.
    – ECode
    Nov 12 '18 at 17:35
















Do you need your files aggregated for each new day or do you only want the most recent?
– vizyourdata
Nov 12 '18 at 17:22






Do you need your files aggregated for each new day or do you only want the most recent?
– vizyourdata
Nov 12 '18 at 17:22














@vizyourdata I want to use the most recent one.
– ECode
Nov 12 '18 at 17:35




@vizyourdata I want to use the most recent one.
– ECode
Nov 12 '18 at 17:35












2 Answers
2






active

oldest

votes


















3














This can be done with Tableau alone if your data is not extremely huge.




  1. Create a union in your csv connection, select the type as Wildcard and enter the pattern.
    enter image description here


  2. Create a data source/extract filter to keep only Top 1 path. (Extract recommended)
    enter image description here


  3. Final Result (Here 20181111 is the latest file)
    enter image description here



PS: For some date formats, TOP 1 of max may not return the correct result. In that case, create a calculated date field from filename and apply TOP1 filter based on that.






share|improve this answer























  • Cool! I hadn't seen this before. Which version are you running?
    – vizyourdata
    Nov 12 '18 at 22:14










  • @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
    – Jose Cherian
    Nov 12 '18 at 23:26



















2














This is something that can be done outside of Tableau in a batch command or python script. Both can be automated with Windows scheduler if on Windows. Ultimately, you want to pick up the most recent file and copy it to something like datasample_today.csv then connect Tableau to that file. Tableau will then always be connected to the latest file. Here is how you could do it in Python.



Python:



import glob

import os



list_of_files = glob.glob('/path/to/folder/*.csv') #* is wildcard

latest_file = max(list_of_files, key=os.path.getctime)

print(latest_file)



from shutil import copyfile



copyfile(latest_file, '<your dir>datasample_today.csv')


I'm not at all proficient in batch commands so you'll have to test this out and there is a lot here on SO to help.



Batch:



FOR /F %%I IN ('DIR *.* /B /O:-D') DO COPY %%I <<NewDir>> & EXIT





share|improve this answer























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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    3














    This can be done with Tableau alone if your data is not extremely huge.




    1. Create a union in your csv connection, select the type as Wildcard and enter the pattern.
      enter image description here


    2. Create a data source/extract filter to keep only Top 1 path. (Extract recommended)
      enter image description here


    3. Final Result (Here 20181111 is the latest file)
      enter image description here



    PS: For some date formats, TOP 1 of max may not return the correct result. In that case, create a calculated date field from filename and apply TOP1 filter based on that.






    share|improve this answer























    • Cool! I hadn't seen this before. Which version are you running?
      – vizyourdata
      Nov 12 '18 at 22:14










    • @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
      – Jose Cherian
      Nov 12 '18 at 23:26
















    3














    This can be done with Tableau alone if your data is not extremely huge.




    1. Create a union in your csv connection, select the type as Wildcard and enter the pattern.
      enter image description here


    2. Create a data source/extract filter to keep only Top 1 path. (Extract recommended)
      enter image description here


    3. Final Result (Here 20181111 is the latest file)
      enter image description here



    PS: For some date formats, TOP 1 of max may not return the correct result. In that case, create a calculated date field from filename and apply TOP1 filter based on that.






    share|improve this answer























    • Cool! I hadn't seen this before. Which version are you running?
      – vizyourdata
      Nov 12 '18 at 22:14










    • @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
      – Jose Cherian
      Nov 12 '18 at 23:26














    3












    3








    3






    This can be done with Tableau alone if your data is not extremely huge.




    1. Create a union in your csv connection, select the type as Wildcard and enter the pattern.
      enter image description here


    2. Create a data source/extract filter to keep only Top 1 path. (Extract recommended)
      enter image description here


    3. Final Result (Here 20181111 is the latest file)
      enter image description here



    PS: For some date formats, TOP 1 of max may not return the correct result. In that case, create a calculated date field from filename and apply TOP1 filter based on that.






    share|improve this answer














    This can be done with Tableau alone if your data is not extremely huge.




    1. Create a union in your csv connection, select the type as Wildcard and enter the pattern.
      enter image description here


    2. Create a data source/extract filter to keep only Top 1 path. (Extract recommended)
      enter image description here


    3. Final Result (Here 20181111 is the latest file)
      enter image description here



    PS: For some date formats, TOP 1 of max may not return the correct result. In that case, create a calculated date field from filename and apply TOP1 filter based on that.







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Nov 12 '18 at 23:29

























    answered Nov 12 '18 at 21:46









    Jose Cherian

    3,15812227




    3,15812227












    • Cool! I hadn't seen this before. Which version are you running?
      – vizyourdata
      Nov 12 '18 at 22:14










    • @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
      – Jose Cherian
      Nov 12 '18 at 23:26


















    • Cool! I hadn't seen this before. Which version are you running?
      – vizyourdata
      Nov 12 '18 at 22:14










    • @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
      – Jose Cherian
      Nov 12 '18 at 23:26
















    Cool! I hadn't seen this before. Which version are you running?
    – vizyourdata
    Nov 12 '18 at 22:14




    Cool! I hadn't seen this before. Which version are you running?
    – vizyourdata
    Nov 12 '18 at 22:14












    @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
    – Jose Cherian
    Nov 12 '18 at 23:26




    @vizyourdata, 2018.2, but I remember using this even in 10.0. Please note that for some date formats, you might need to convert it to a date before applying the TOP filter as max may not interpret it correctly.
    – Jose Cherian
    Nov 12 '18 at 23:26













    2














    This is something that can be done outside of Tableau in a batch command or python script. Both can be automated with Windows scheduler if on Windows. Ultimately, you want to pick up the most recent file and copy it to something like datasample_today.csv then connect Tableau to that file. Tableau will then always be connected to the latest file. Here is how you could do it in Python.



    Python:



    import glob
    
import os
    

    
list_of_files = glob.glob('/path/to/folder/*.csv') #* is wildcard
    
latest_file = max(list_of_files, key=os.path.getctime)
    
print(latest_file)
    

    
from shutil import copyfile
    

    
copyfile(latest_file, '<your dir>datasample_today.csv')


    I'm not at all proficient in batch commands so you'll have to test this out and there is a lot here on SO to help.



    Batch:



    FOR /F %%I IN ('DIR *.* /B /O:-D') DO COPY %%I <<NewDir>> & EXIT





    share|improve this answer




























      2














      This is something that can be done outside of Tableau in a batch command or python script. Both can be automated with Windows scheduler if on Windows. Ultimately, you want to pick up the most recent file and copy it to something like datasample_today.csv then connect Tableau to that file. Tableau will then always be connected to the latest file. Here is how you could do it in Python.



      Python:



      import glob
      
import os
      

      
list_of_files = glob.glob('/path/to/folder/*.csv') #* is wildcard
      
latest_file = max(list_of_files, key=os.path.getctime)
      
print(latest_file)
      

      
from shutil import copyfile
      

      
copyfile(latest_file, '<your dir>datasample_today.csv')


      I'm not at all proficient in batch commands so you'll have to test this out and there is a lot here on SO to help.



      Batch:



      FOR /F %%I IN ('DIR *.* /B /O:-D') DO COPY %%I <<NewDir>> & EXIT





      share|improve this answer


























        2












        2








        2






        This is something that can be done outside of Tableau in a batch command or python script. Both can be automated with Windows scheduler if on Windows. Ultimately, you want to pick up the most recent file and copy it to something like datasample_today.csv then connect Tableau to that file. Tableau will then always be connected to the latest file. Here is how you could do it in Python.



        Python:



        import glob
        
import os
        

        
list_of_files = glob.glob('/path/to/folder/*.csv') #* is wildcard
        
latest_file = max(list_of_files, key=os.path.getctime)
        
print(latest_file)
        

        
from shutil import copyfile
        

        
copyfile(latest_file, '<your dir>datasample_today.csv')


        I'm not at all proficient in batch commands so you'll have to test this out and there is a lot here on SO to help.



        Batch:



        FOR /F %%I IN ('DIR *.* /B /O:-D') DO COPY %%I <<NewDir>> & EXIT





        share|improve this answer














        This is something that can be done outside of Tableau in a batch command or python script. Both can be automated with Windows scheduler if on Windows. Ultimately, you want to pick up the most recent file and copy it to something like datasample_today.csv then connect Tableau to that file. Tableau will then always be connected to the latest file. Here is how you could do it in Python.



        Python:



        import glob
        
import os
        

        
list_of_files = glob.glob('/path/to/folder/*.csv') #* is wildcard
        
latest_file = max(list_of_files, key=os.path.getctime)
        
print(latest_file)
        

        
from shutil import copyfile
        

        
copyfile(latest_file, '<your dir>datasample_today.csv')


        I'm not at all proficient in batch commands so you'll have to test this out and there is a lot here on SO to help.



        Batch:



        FOR /F %%I IN ('DIR *.* /B /O:-D') DO COPY %%I <<NewDir>> & EXIT






        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 12 '18 at 22:17

























        answered Nov 12 '18 at 19:25









        vizyourdata

        57411031




        57411031






























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