From_QIS_Time__c false IF(OR(ISBLANK(SAP_Transfer_day__c),ISBLANK(QIS_ID__r.QIS_Submit_day__c)),null,SAP_Transfer_day__c - QIS_ID__r.QIS_Submit_day__c) BlankAsZero 从QIS经过时间 18 false 2 false false Number false