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Merging a csv with date data to a shapefile

Question asked by jphigh_udel on Jul 19, 2018
Latest reply on Jul 20, 2018 by LTran-esristaff

I am trying to use the time slide feature to show how Overdoses change from year to year by census tract. I have a csv. with the a date field (there are three years of data) so delawre has 215 census tracts so there are 645 entries in my csv. The data is stored in rows as recommended by ArcGIS. However, when I open arcmap and try to merge the CSV to a shapefile of Delaware's census tracts only 215 cases come over. This prevent me from using the time slide function. I just dont know what to do. I've looked everywhere and just cant figure out how to do the data merge correctly. Any help would be greatly appreciated.