MySQL 根据日期查询并统计数据

1 查询前7天的日期

select a.click_date
from (
    SELECT date_sub(curdate(), interval 1 day) as click_date
    union all
    SELECT date_sub(curdate(), interval 2 day) as click_date
    union all
    SELECT date_sub(curdate(), interval 3 day) as click_date
    union all
    SELECT date_sub(curdate(), interval 4 day) as click_date
    union all
    SELECT date_sub(curdate(), interval 5 day) as click_date
    union all
    SELECT date_sub(curdate(), interval 6 day) as click_date
        union all
    SELECT date_sub(curdate(), interval 7 day) as click_date
) a

查询结果

2 查询订单表出现日期，成交额总和

没有出现的日期，不会被查出来

select DATE_FORMAT(o_id,"%Y-%m-%d") as date,sum(o_turnover)*0.15 u_commission from orders 
where o_id between "2021-05-26" and "2021-06-02" and uid = 2 
group by date;

3 根据日期统计数据

select DATE_FORMAT(date,"%Y-%m-%d") day,count(*) num from log group by day;