我有这个查询,我试图从修订计划中选择所有必须在本月完成的设备,如果我没有为该设备制作服务表。我想要做这样的事情:在where子句中使用select中的计数
select revision_planning.id_echip as echip_id
from revision_planning
inner join service_sheet on echip_id=service_sheet.id_echip
where revision_planning.next_rev_date between '2016-10-01' and '2016-10-31'
and count (select * from service_sheet
where echip_id=service_sheet.id_echip
and service_sheet.`data`between '2016-10-01 00:00:00'and '2016-10-31 23:59:18') = 0
and revision_planning.employee_name='first_last_name'
我为COUNT = 0检查声明使用MySQL。 –