"unionselect '三区', sum(zky_3_zone) zky from dm_qxlwfqhz_infowhere 1=1"+ if(len(tbsj_ks) == 0,"","and tjny >= '" +tbsj_ks + "'") + if(len(tbsj_js) == 0,"","and tjny <= '" +tbsj_js + "'")+"unionselect '四区', sum(zky_4_zone) zky from dm_qxlwfqhz_infowhere 1=1 "这是预览显示的顺序