How to sum the result from 2 different queries?

Question

Hi ,
I would like to add the reslut of the below queries and insert into the status_count column of the temp table called edr_status_by_report_data.
How could I do that ?
SELECT         
          COUNT(status_code)
    FROM (SELECT site_id,
                 site_lane_id,
                (SELECT NVL(MAX(interval_start_date_time), date_time)
                   FROM edr_rpt_tmp_grouping_table
                  WHERE interval_start_date_time <= date_time) bin_start_date_time,
                        TO_NUMBER(TO_CHAR(date_time, 'hh24')) period,
                        vehicle_status  status_code
                   FROM edr_status_by_veh_data
                  WHERE vehicle_error_count = 0                         
                    AND vehicle_status > 0                   
         ) vehicles
SELECT         
          COUNT(status_code)
    FROM (SELECT site_id,
                 site_lane_id,
                (SELECT NVL(MAX(interval_start_date_time), date_time)
                   FROM edr_rpt_tmp_grouping_table
                  WHERE interval_start_date_time <= date_time) bin_start_date_time,
                        TO_NUMBER(TO_CHAR(date_time, 'hh24')) period,
                        vehicle_status  status_code
                   FROM edr_status_by_veh_data
                  WHERE vehicle_error_count = 0                         
                    AND vehicle_status = 0                   
         ) vehicles
      ;              

Answer 1

That just becomes:
SELECT count(*)
FROM   (SELECT site_id,
               site_lane_id,
               (SELECT NVL(MAX(interval_start_date_time), date_time)
                FROM   edr_rpt_tmp_grouping_table
                WHERE  interval_start_date_time <= date_time) bin_start_date_time,
               TO_NUMBER(TO_CHAR(date_time, 'hh24')) period,
               vehicle_status status_code
        FROM   edr_status_by_veh_data
        WHERE  vehicle_error_count = 0
        AND    vehicle_status >= 0);Or, if you needed to have both columns separately for some other purpose, you could still get them in one query:
SELECT COUNT(CASE WHEN status_code > 0 THEN 1) count_gt_zero,
       COUNT(CASE WHEN status_code = 0 THEN 1) count_zero,
       COUNT(CASE WHEN status_code > 0 THEN 1)
         + COUNT(CASE WHEN status_code = 0 THEN 1) total
FROM   (SELECT site_id,
               site_lane_id,
               (SELECT NVL(MAX(interval_start_date_time), date_time)
                FROM   edr_rpt_tmp_grouping_table
                WHERE  interval_start_date_time <= date_time) bin_start_date_time,
               TO_NUMBER(TO_CHAR(date_time, 'hh24')) period,
               vehicle_status status_code
        FROM   edr_status_by_veh_data
        WHERE  vehicle_error_count = 0
        AND    vehicle_status >= 0);