我想將下面的聯(lián)合查詢轉(zhuǎn)換為 laravel 查詢DB::select("select lead_master.lead_stage from lead_master inner join  user_master on user_master.user_name=lead_master.assigned_user_name where region in (".$geo_string.") and teams in (".$filter_teams_string.") group by (lead_stage) unionselect  meeting_hash from meetings_master where assigned_user_name in (".$filter_username_string.") and meeting_hash in ('follow_up','first_time') group by (meeting_hash)  union select sales_stage from opportunity_master where sales_stage in ('Identified','QO_to be  approved') and assigned_user in (".$filter_username_string.") group by (sales_stage)");以下查詢?cè)?postgre 中正常運(yùn)行