多表联查 若某一字段相同 且有状态跟时间字段，选取该状态下 时间最近的一条数据

select info.* from (

select

ws.pk,

ra.pk poaId,

rb.resource_name,

rb.resource_type,

to_char(ra.calendar_start_time,'yyyy-MM-dd hh24:mi:ss') start_time,

to_char(ra.calendar_end_time,'yyyy-MM-dd hh24:mi:ss') end_time,

bu.user_name,

ws.bar_code,

ra.WORK_FLOW_STATUS,

bd.department_name

from rm_warehousing_stock ws

left join rm_base rb

on rb.pk = ws.rm_base_pk

left join rm_resource_apply ra

on ws.pk = ra.warehousing_stock_pk

left join base_user bu

on ra.PARTICIPANT = bu.user_code

left join base_department bd

on bd.department_code = bu.department_code

where resource_type='2' and ws.publish_status='1'

and not exists(select 1 from rm_resource_apply sub where sub.work_flow_status !='6' and ra.warehousing_stock_pk=sub.warehousing_stock_pk

and ra.calendar_start_time > sub.calendar_start_time ) ) info where info.work_flow_status !='6' or info.work_flow_status is null