merge into t_product tp using(select t.IMAA017,t.IMAA001 from t100_product_weight t ) s on(tp.PROD_CODE = s.IMAA001) when matched then update set tp.weight = s.IMAA017;
merge into t_product tp using(select t.IMAA017,t.IMAA001 from t100_product_weight t ) s on(tp.PROD_CODE = s.IMAA001) when matched then update set tp.weight = s.IMAA017;