日期:2014-05-16 浏览次数:20925 次
select A.* from test A,test B where B.id=4 and A.timedate<=B.timedate order by A.timedate desc,A.id desc limit 1,1
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你要物理顺序,插入有自增字段的临时表 OR 用变量解决
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set @iid := 0; drop table if exists tmp_t; -- 如果使用临时表则不能自连接,可以创建两个临时表来处理,或是如此示例使用物理表,最后删除“临时”用的“物理”表 create table tmp_t select @iid:=@iid+1 as iid, xxx.* from Test order by timedate desc, id desc; select t2.id, t2.timedate from tmp_t as t1 left join tmp_t as t2 on t1.iid = t2.iid - 1 where t1.id = [指定的ID]; -- 执行 drop table if exists tmp_t;
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mysql> select * from test; +------+---------------------+ | id | timedate | +------+---------------------+ | 1 | 2011-07-11 00:00:00 | | 2 | 2011-06-11 00:00:00 | | 3 | 2011-06-11 00:00:00 | | 4 | 2011-06-11 00:00:00 | | 5 | 2011-09-11 00:00:00 | | 6 | 2011-05-11 00:00:00 | +------+---------------------+ 6 rows in set (0.00 sec) mysql> select * from test -> where timedate<(select timedate from Test where id=4) -> or (timedate=(select timedate from Test where id=4) and id <4) -> order by timedate desc,id desc -> limit 1; +------+---------------------+ | id | timedate | +------+---------------------+ | 3 | 2011-06-11 00:00:00 | +------+---------------------+ 1 row in set (0.00 sec) mysql> select * from test -> where timedate<(select timedate from Test where id=3) -> or (timedate=(select timedate from Test where id=3) and id <3) -> order by timedate desc,id desc -> limit 1; +------+---------------------+ | id | timedate | +------+---------------------+ | 2 | 2011-06-11 00:00:00 | +------+---------------------+ 1 row in set (0.00 sec) mysql> select * from test -> where timedate<(select timedate from Test where id=2) -> or (timedate=(select timedate from Test where id=2) and id <2) -> order by timedate desc,id desc -> limit 1; +------+---------------------+ | id | timedate | +------+---------------------+ | 6 | 2011-05-11 00:00:00 | +------+---------------------+ 1 row in set (0.00 sec) mysql>