mysql 汇总

子查询：
    select

  a.id,a.hotelname,max(b.day) as day,a.hotelrankid,

  c.hotelrank,min(b.basicprice) as minprofit,

  min(b.price) as minprice,d.suppliername

  from 

  sline_hotel as a 

  left join

  (

  select * from sline_hotel_room_price

  ) as b on a.id=b.hotelid

  LEFT JOIN

(

select 

*

from

sline_hotel_rank

) as c on c.id = a.hotelrankid

LEFT JOIN

(

select 

*

from

sline_supplier

) as d on d.id = a.supplierlist

  where a.id=$id group by a.id