select <iftest="projectId == null">'合计' AS project_name,</if><iftest="projectId != null"> project_name,'合计' AS dept_name,</if> group_CONCAT(DISTINCT YEAR (statistics_start),'年',MONTH (statistics_start),'月') AS date, sum(total_time) AS total_time, sum(cost) AS cost
select <iftest="projectId == null">'合计' AS project_name,</if><iftest="projectId != null"> project_name,'合计' AS dept_name,</if> group_CONCAT(DISTINCT YEAR (statistics_start),'年',MONTH (statistics_start),'月') AS date,year(statistics_start) AS year, sum(total_time) AS total_time, sum(cost) AS cost
from work_project_time_cost ptc join work_project p on ptc.project_id = p.id join work_dept d on ptc.dept_id = d.id