织梦DedeCMS（Dedecms）中常用的统计SQL语句如下：
1. 统计网站总访问量
SELECT COUNT(*) AS total_visits FROM dede_stat
2. 统计网站今日访问量
SELECT COUNT(*) AS today_visits FROM dede_stat WHERE daydate = CURDATE()
3. 统计网站总独立IP数
SELECT COUNT(DISTINCT ip) AS total_unique_ips FROM dede_stat
4. 统计网站今日独立IP数
SELECT COUNT(DISTINCT ip) AS today_unique_ips FROM dede_stat WHERE daydate = CURDATE()
5. 统计网站总页面浏览量
SELECT SUM(pageview) AS total_page_views FROM dede_stat
6. 统计网站今日页面浏览量
SELECT SUM(pageview) AS today_page_views FROM dede_stat WHERE daydate = CURDATE()
7. 统计网站文章总阅读量
SELECT SUM(readtimes) AS total_article_views FROM dede_arcrank
8. 统计网站今日文章阅读量
SELECT SUM(readtimes) AS today_article_views FROM dede_arcrank WHERE daytime = CURDATE()
9. 统计网站会员总数
SELECT COUNT(*) AS total_members FROM dede_member
10. 统计网站今日注册会员数
SELECT COUNT(*) AS today_new_members FROM dede_member WHERE regdate = CURDATE()
注意：以上SQL语句中的表名和字段名可能因织梦DedeCMS的版本不同而有所差异，请根据实际情况调整。