Embodiments are provided for creating and reusing custom data types in a database. A selection of a field or group of fields may be received from a database table in the database by a database software application executing on a computer system. Each selected field may include a set of field properties. The application may further receive a user input to initiate saving the selected field or group of fields as a custom data type. In response to receiving the input, the application may be configured to generate a dialog for receiving custom data type information for the selected field or group of fields and save the selected field or group of fields as a custom data type. The custom data type may then be reused by the application in the database.