我有一些现有代码：

select
job.job_number,job_status_log.status_code,job_status.status_name,central_site.site_code,central_site.site_name,'wc ' || to_char(trunc(job.job_entry_date,'IW'),'dd month')  as week_job_raised,TO_CHAR(job.job_entry_date,'MONTH') as month_job_raised,'wc ' || to_char(trunc(job.actual_comp_date,'dd month')  as week_job_complete,TO_CHAR(job.actual_comp_date,'MONTH') as month_job_complete,job.job_entry_date as Job_Started,job.actual_comp_date as Job_Completed,job.job_notes,job.job_easting,job.job_northing,job_attribute.param_num_value as Hours_On_Job

from
job
inner join job_status_log on job.job_number = job_status_log.job_number
inner join job_status on job_status_log.status_code = job_status.status_code
inner join central_site on job.site_code = central_site.site_code
inner join job_attribute on  job.job_number = job_attribute.job_number 

where
job_status_log.allocated_officer = 'ID51' and
job.job_log_number = job_status_log.job_log_number and
job_status_log.status_code not in ('XJOB','9990') and
job_attribute.param_type_code = 'GRFF' and
job.actual_comp_date is not null

产生以下内容：

Job Number    Site_Code     Hours_On_Job
12345            23               10
12346            23                8
12347            8                 2
12348            3                 3

我想做的是找到一种添加另一列的方法，以将报告中每个SITE_CODE的所有HOURS_ON_JOB值相加，然后将其显示在名为TOTAL_HOURS_ON_SITE的新列中

Job Number    Site_Code     Hours_On_Job     Total_Hours_On_Site
12345            23               10                 18
12346            23                8                 18 
12347            8                 2                  2 
12348            3                 3                  3