explain select d1.id from
doctor_share as d1 inner join
(select id from doctor_share
where check_status=1 and is_delete=0
) as d2
on d1.id=d2.id
where d1.type=1
order by id desc
limit 0,20
explain select d1.id from
doctor_share as d1 inner join
(select id from doctor_share
where check_status=1 and is_delete=0
) as d2
on d1.id=d2.id
where d1.type=1
order by id desc
limit 0,20
先放個鏈接: http://hi.baidu.com/dylwx_2005/blog/item/ef986a1a1e5b9fc6ac6e752e.html
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