ORA-40390：PMML DerivedField must have a unique name specified
错误码
错误描述：PMML DerivedField must have a unique name specified
错误原因："The Predictive Model Markup Language (PMML) DerivedField did not reference another defined field and did not have a unique name."
解决方法："Specify a unique name for each DerivedField."
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