对于WordPress,我使用相同的源代码和相同的数据库,只是mysql版本不同。这使我的页码帖有重复之处。这是我发现的。知道怎么用更高的版本来解决吗?
这是针对第2页和第3页查询输出的。左边是MySql 5.5,右边是MySql 5.6.up_posts.ID是独一无二的。OR up_posts.post_status = 'private' OR up_posts.post_status = 'hidden') ORDER BY up_posts.post_date DESCO
在MySQL中,group by做了一个隐式order by ASC。但是,如果您想要ORDER BY ..DESC,则MySQL必须完全相反地对结果集进行排序。GROUP BY -mydate -- group by trick to force a `group by ... desc`
ORDER BY myda
嗨,我知道基本的MySQL查询格式,但是现在我需要做一些复杂的查询。假设(为了解释的目的),我有3个表,列为id、item_name和no_of_views。Table2) (SELECT * FROM Table2) (SELECT * FROM Table2)
ORDER by no_of _views DESC
AND SOME COMPLEX WHERE CONDITIONS) as T ORDER BY column1 DESC LIMIT 10)(SELECT * FROM (SELECTAND SOME COMPLEX WHERE CONDITIONS) as T ORDER BY column2 DESC LIMIT 10)(SELECT * FROM (SELECTAND SOME COMPLEX WHERE CONDITIONS) as T ORDER BY column3 DESC LIMIT 10)
(
> select length(items) as a from qiban.od_form_items order by a desc limit 1; +-------+ | a | +--order by a desc limit 1; +------+ | a | +------+ | 6556 | +------+ 1 rows in set (0.01 sec)
但是在mysqldesc limit 10; +---------------------+------------+------
我有一个while循环,查询在其中,MySQL查询工作得很好。下面是循环:{ $desc = $r3[temp parts table and the qty
$resut4 = mysql_query("INSERT INTO `temp_grabtec_parts`(`temp_id`,`part_num`,`de