49: , C_task_id NUMBER )
50: IS
51: SELECT accum.accum_period
52: FROM pa_project_accum_headers accum 53: , pa_periods per 54: WHERE accum.project_id = C_project_id
55: AND accum.task_id = nvl(C_task_id, accum.task_id)
56: AND per.period_name = accum.accum_period
57: ORDER BY per.start_date desc;