I have a data table that I need to trim down, merging records which have the same value in an ID field and performing a couple math operations on various other fields (summing, averaging). The Dissolve tool in ArcGIS does this for feature classes, but it doesn't work on tables. I realize there's probably a tool in ArcGIS that does this (it's basically a Dissolve with no geometry) but I haven't found it and am in a bit of a hurry.

Is there one? I have an ArcInfo license available if necessary.


You can do this with the Summary Statistics (Analysis) tool. The case field parameter is what you use to "dissolve". From the above link:

case_field [case_field,...] (Optional) The fields in the Input Table used to calculate statistics separately for each unique attribute value (or combination of attribute values when multiple fields are specified).

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    This answer is correct for the specific question; however, I want to provide a warning to those who may be looking to dissolve without any statistics fields: it won't work. You must submit a statistics field. If you're looking to "dissolve" a table but not calculate summary statistics, then you can use the Delete Identical tool. desktop.arcgis.com/en/arcmap/10.3/tools/data-management-toolbox/… – Tom Jul 12 '16 at 16:58

This sounds like you need to look at the Summary Statistics tool which I find to be a bit of a Swiss Army Knife in that it comes with a Basic (formerly called) ArcView level license and can often be used in place of Frequency (that needs Advanced/ArcInfo) and PULLITEMS (that needs ArcInfo Workstation:-) to reorder fields.


The Dissolve_management tool works on tables as well as feature classes.

  • 1
    ? In arcgis desktop 10.3.1 I get an "One or more dropped items were invalid and will not be added to the control." error. (ArcToolbox >> Data Management Tools >> Generalization >> Dissolve) – matt wilkie Dec 10 '15 at 18:37

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