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To change the alias, default value, or length of a field, double-click the value in the Field Properties list and type a new value.To change the data type, choose a new type from the corresponding Data Type drop-down list.To rename the field, click the text of the name and type a new name.Choose the field you want to modify from the Field Name list.Right-click the table or feature class and click Properties.If the table or feature class is in an enterprise, workgroup, or desktop geodatabase, you must connect as the table owner to modify field properties. Start ArcMap or ArcCatalog and connect to the geodatabase that contains the table or feature class for which you want to modify field properties. If your table or feature class contains data, you can only increase the field length.įield properties are accessed from the Fields tab of the Table Properties or Feature Class Properties dialog box.įollow these steps to modify existing field properties: If your table or feature class does not contain data, you can increase or decrease this value. If the table or feature class is registered as versioned and its adds table contains data, you cannot change the Allow NULL values property from Yes to No. For example, you cannot change a long integer or float to a short integer, or change a blob to a text. If the field contains data, you cannot change data types that would lead to loss of data. See Defining feature class properties for a list of these fields. For example, if your database does not allow you to change the length of a field in a table that contains data, you cannot change the field length through ArcGIS.įield properties that can be altered are as follows:Ĭertain system fields cannot be renamed. For enterprise geodatabases, the properties that can be changed and how they can be changed depends on the database management system you are using you can only make changes that your database allows. Some field properties can be changed after the table or feature class is created. The other properties you set are dependent upon the data type of the field. In ArcGIS, the first properties you set for a field are its name and data type.
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All fields have properties, which are set when you create a table or feature class.