php如何查询某月或者某日有数据且输出(文章归档功能)
php怎么查询某月或者某日有数据且输出(文章归档功能)
有 articles表
id class title content pubtime
1 10 标题1 内容1 1342756599
2 11 标题2 内容2 1339392385
3 12 标题3 内容3 1339390661
4 10 标题4 内容4 1339139926
5 13 标题5 内容5 1339139892
6 16 标题6 内容6 1342756624
希望查询的结果是:
1.如2012年8月、2012年6月内有文章,输出一次 2012年8月、2012年6月的链接,最好能计算出汇总,有多少篇文章。
2.如2012年7月16日、2012年7月28日有文章 则倒序输出 2012年7月28日、2012年7月16日的链接,最好能计算出汇总,有多少篇文章。
不会写,给个思路也行啊。
------解决方案--------------------
- SQL code
SELECT count(1) FROM `articles` WHERE `pubtime` > 6月1号0点时间戳 and `postdate` <font color="#e78608">------解决方案--------------------</font><br>
------解决方案--------------------
- SQL code
>select count(1), date(pubtime) from articles group by date(pubtime);<br><font color="#e78608">------解决方案--------------------</font><br>先把几个点的时间戳取出来.如2012年8月、2012年6月。<br>然后在拼接sql查询,应该很容易的。 <br>别着急,你试试<br><font color="#e78608">------解决方案--------------------</font><br>1、<br>select FROM_UNIXTIME(pubtime, '%Y-%m') as pubtime, count(*) as cnt from articles group by FROM_UNIXTIME(pubtime, '%Y-%m')<br><br><font color="#e78608">------解决方案--------------------</font><br>这是每个月:<br>
- SQL code
>select count(1), extract(year_month from pubtime) from articles group by extract(year_month from pubtime);<br><font color="#e78608">------解决方案--------------------</font><br>有个问题,在sql中使用函数会影响sql的执行效率,被用字段的主键什么的,有时候也没效果
------解决方案--------------------
------解决方案--------------------
- SQL code
SELECTSUM(CASE when MONTH( FROM_UNIXTIME(pubtime, '%Y-%m-%d'))=6 THEN 1 ELSE 0 END)AS sum_6,SUM(CASE when MONTH( FROM_UNIXTIME(pubtime, '%Y-%m-%d'))=8 THEN 1 ELSE 0 END)AS sum_8FROM dc_admin<div class="clear"> </div>

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