获取sql计数和行

Question

我想获取总计行数并获取行数。我有这样的事情

SELECT count(id), id 
FROM post 
LIMIT 10; 

Answer 1

内部查询获取数和使用join就可以得到所需要的数据！

select a.*,b.count 
from post a 
join (SELECT count(id) as count, id 
     FROM post group by id) b 
    on a.id=b.id;