How to Troubleshoot Joins in ArcGIS
ArcGIS is a geographic information system (or GIS) software application. It is a tool for working with and creating geographical data. This data is organized into tables that are displayed on maps. The tables are connected using "joins." Users join tables for the purpose of symbolizing data on a map, such as population size and spending habits. Join errors result in problems such as incorrect record counts or displaying null values appearing in the attribute tables. ArcGIS 10 includes a “Validate Join” feature that analyzes and corrects common join errors.
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Instructions
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Click the “Join Data” button. The “Join Data” dialog box will open.
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Select a table. Choose join attributes from the dialog box. Attributes include the field, the table to join and the field in the table.
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Click the “Join Validate” button. The validation begins checking for errors when joins are created. It checks for such things as field names with invalid characters, field names with matching reserved words and MS Access tables with non-geodatabases.
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References
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