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When a feature class is moved from a non-spatial database to a geodatabase using ArcCatalog, the field data type of the feature class is not retained. The data type in the feature class is converted from 'float' data type to 'double' data type.
A feature class can be moved from one geodatabase to another in ArcCatalog by copying and pasting or exporting the feature class.
This behavior occurs when the precision and data type of a field in a feature class are not set during creation of the field. This causes the float field in the feature class to be converted automatically to double data type.
Specify the precision and scale of a new field on a feature class using the Add Field geoprocessing tool.