mysql:
给指定日期加一天用date_add函数 INterval 1 day
select * from a,b where where a.company like '%张%' and a.id=b.company_id and otime>='2014-10-31' and otime<date_add('2014-11-3', INTERVAL 1 day) order by b.otime limit 0,1000如何查询上一条数据和下一条数据,这种写法为了防止:当你点击当前这一条数据7829时,如果正在这时别人删除了这条数据7829,如何给用户显示上一条数据和下一条数据:
(select '00' tag, id,title,instructions,pic, picsmall from a where id=7829)
UNION ALL
(select '01' tag, id,title,instructions,pic, picsmall from a where id > 7829 limit 1) -- <!-- 下一条 -->
UNION ALL
(select '02' tag, id,title,instructions,pic, picsmall from a where id < 7829 order by id DESC limit 1) -- <!-- 上一条 -->以上做法似乎是行不通的。可以试试以下方法:
select vtb.tag,a.id,a.title,a.instructions,a.pic,a.pic_small picsmall
from (select '00' tag,7829 vid) vtb left join a on vtb.vid = tb_mito.id
UNION ALL
select vtb.tag,a.id,a.title,a.instructions,a.pic,a.pic_small picsmall
from (select '01' tag,(select id from tb_mito where id >7829 limit 1) vid) vtb left join a on vtb.vid = a.id
UNION ALL
select vtb.tag,a.id,a.title,a.instructions,a.pic,a.pic_small picsmall
from (select '02' tag,(select id from a where id < 7829 order by id DESC limit 1) vid) vtb left join a on vtb.vid = tb_mito.id
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