SELECTpp.policy_numASPolicyNumber,pp.policy_period_eff_dateASEffectiveDate,NVL(pp.cancel_date,pp.policy_period_exp_date)ASExpirationDateFROMpolicy_period_allppJOIN(-- get the most recent issued period per policySELECTpp.policy_num,MAX(pp.policy_period_eff_date)ASpolicy_period_eff_dateFROMpolicy_period_allppJOIN(-- get all issued periods for all policiesSELECTpolicy_period_eff_date,policy_numFROMendorsementWHEREendorse_code='P401'ANDprinted_dateISNOTNULLUNIONSELECTpolicy_period_eff_date,policy_numFROMpolicy_period_non_wcisWHEREpolicy_period_status_code='E')issued_periodsONpp.policy_num=issued_periods.policy_numANDpp.policy_period_eff_date=issued_periods.policy_period_eff_dateWHEREpp.policy_period_eff_date<>NVL(cancel_date,policy_period_exp_date)GROUPBYpp.policy_num)max_periodsONpp.policy_num=max_periods.policy_numANDpp.policy_period_eff_date=max_periods.policy_period_eff_dateWHEREpp.policy_numIN({0})