Last_Years_Repair_Month__c IF(IF( (Today() - InstallDate__c) / 365 * 12 < 1, 1, (Today() - InstallDate__c) / 365 * 12 )>36,36,IF( (Today() - InstallDate__c) / 365 * 12 < 1, 1, MCEILING((Today() - InstallDate__c) / 365 * 12) )) false IF(Today() > ADDMONTHS( NULLVALUE(InstallDate__c, Createdate__c ) ,36), Today() - ADDMONTHS(Today(),-36) ,Today() - NULLVALUE(InstallDate__c, Createdate__c )) BlankAsZero 过去3年经历天数 18 false 2 false Number false