获取sql计数和行数

Question

我想获得总行数并获取行数。我有类似的东西

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

Answer 1

内部查询获取计数并使用join您可以获得所需的数据！

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;