DELETE FROM mom_eam_repair_order_risk_prevention WHERE repair_order_id = #{mainId} SELECT t1.id id, t2.num riskPreventionNum, t2.name riskPreventionName, t2.description riskPreventionDescription, t2.measure measure FROM mom_eam_repair_order_risk_prevention t1 left join (select * from mom_eam_risk_prevention where del_flag = 0) t2 on t1.risk_prevention_id = t2.id WHERE t1.repair_order_id = #{mainId} and t1.del_flag = 0