数据库占比连表分组降序分页查询例子

表结构与关联关系如下图:

SELECT
p.name AS package_name,
COUNT(o.id) AS package_order_count,
COUNT(o.id)/(SELECT COUNT(id) FROM t_order) AS proportion
FROM t_package AS p INNER JOIN t_order AS o ON p.id=o.package_id
GROUP BY package_name
ORDER BY package_name DESC
LIMIT 0,4

查询的结果