mysql真正读上一条下一条的SQL有没有???
那个啥ID<>之类的请别发
这条经测错误跟啥 id <> 之类的结果没区别.都不对
SELECT * FROM Test WHERE ID IN (SELECT CASE WHEN SIGN(ID – 3) > 0 THEN MIN(ID) WHEN SIGN(ID – 3) < 0 THEN MAX(ID) END AS ID FROM test WHERE ID <> 3 GROUP BY SIGN(ID – 3) ORDER BY SIGN(ID – 3)) ORDER BY ID ASC;
如查询语句:SELECT * FROM `Test` order by orderby desc
结果:
id orderby
3 51
1 24
4 11
7 6
6 3 //////////////
2 2
5 1
id=6 的
上一条应该是id=7
下一条应该是id=2
有没牛人??
下面是测试表SQL
CREATE TABLE IF NOT EXISTS `test` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`orderby` int(11) NOT NULL DEFAULT ‘0’,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=8 ;
INSERT INTO `Test` (`id`, `orderby`) VALUES
(1, 24),
(2, 2),
(3, 51),
(4, 11),
(5, 1),
(6, 3),
(7, 6);
/
(SELECT * FROM `Test` where id > 6 order by orderby limit 1)
union all
(SELECT * FROM `Test` where id < 6 order by orderby desc limit 1)
