I currently have a point shapefile, and a table. The tables are set up in a many-to-one relation with "PlotName" as the primary and foreign keys.

The shapefile contains the primary key (i.e. A West H1), the table contains many fields with the same key.

In the table, each row has both a key (PlotName), a value (PercentCover), and whether this value is Native or Invasive (0 or 1).

I would like to create a field in the shapefile (TotalPercentNative) that contains the sum of (PercentCover) based on whether it is native or invasive.

Do you have any suggestions?


You could run the Summary Statistics tool on the table to sum your field, and then join the summary table to the points instead.

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