http://stackoverflow.com/questions/17109818/install-php-mcrypt-on-centos-6
问题：Call to undefined function mcrypt_get_block_size()
需要安装php的 myrypt扩展
解决方案：
1.
yum up
oracle sql 按年、月、周、日，分组查询统计数据：
1、SQL语句如下
select sum(count),to_char(to_date(ext2,"YYYY-MM-dd"),"iw") from CMS_INDEXPV where site_id = "0002"
and ext2 is not nul
