405 Studio — Thu, 06 Apr 2006 08:22:00 GMT

有些时候需要查询给定ID的前一记录后一记录和ID对应的记录。比如一些新�ȝ��l�中�Q�通过GET�Ҏ��获得文章ID需要显�C�“前一��文章”“后一��文章�?和ID指定的文章�?br />下面是我用的一�U�查询方法，可能效率�Q�如果有更好的方法，��L��我留�a��Q�不胜感�Ȁ�Q?br />

SELECT art_id, art_pdate
FROM ecos_article
WHERE art_id>75 limit 0,1
UNION
SELECT art_id, art_pdate
FROM ecos_article
WHERE art_id<=75 ORDER BY art_id DESC limit 0,3;

效果如下�Q?br />mysql> SELECT art_id, art_pdate FROM ecos_article limit 0,5;
+--------+------------+
| art_id | art_pdate |
+--------+------------+
|     73 | 2005-12-01 |
|     74 | 2005-12-01 |
|     75 | 2005-12-01 |
|     76 | 2005-12-01 |
|     77 | 2005-12-01 |
+--------+------------+

mysql> SELECT art_id, art_pdate
    -> FROM ecos_article
    -> WHERE art_id>75 limit 0,1
    -> UNION
    -> SELECT art_id, art_pdate
    -> FROM ecos_article
    -> WHERE art_id<=75 ORDER BY art_id DESC limit 0,3;
+--------+------------+
| art_id | art_pdate |
+--------+------------+
|     76 | 2005-12-01 |
|     75 | 2005-12-01 |
|     74 | 2005-12-01 |
+--------+------------+

405 Studio 2006-04-06 16:22 发表评论

MySQL出错对照

405 Studio — Tue, 04 Apr 2006 00:18:00 GMT

摘要: 1005�Q�创��p�|
在某位老兄的Blog看到的，觉得有用�Q�Ctrl + C Ctrl + V
1006�Q�创建数据库��p�|
1007�Q�数据库已存在，创徏数据库失�?
1008�Q�数据库不存在，删除数据库失�?
1009�Q�不能删除数据库文�g��D��删除数据库失�?
1010�Q�不能删除数据目录导致删除数据库��p�|
1011�Q�删除数据库文�g��p�| 阅读全文

405 Studio 2006-04-04 08:18 发表评论

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MySQL出错对照