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FAQ: Why is a second ObjectID field added to a table exported from a OLE DB source to a Geodatabase?

Question

Why is a second ObjectID field added to a table exported from a OLE DB source to a Geodatabase?

Answer

If the OLE DB table being exported to a Geodatabase already contains an ObjectID field (data type long integer), this will be renamed to ObjectID_1 and a new ObjectID field created (ESRI data type ObjectID). This is to ensure that the new table is registered with the Geodatabase.