pd.merge( df_tmp_01, df_sch_schd[ (df_sch_schd.origin_bizpl_cd == v_biz) & (df_sch_schd.radi_unit == v_radi)] , how='left' , left_on = "oper_dt", right_on ="dt")
pd.merge( df_tmp_01, df_sch_schd[ (df_sch_schd.origin_bizpl_cd == v_biz) & (df_sch_schd.radi_unit == v_radi)] , how='left' , left_on = "oper_dt", right_on ="dt", suffixes=('', '_x')