Question

我正在尝试分析首次购买后30天内购买的用户。我不断得到

错误代码：1064。您的SQL语法有错误；检查与您的MySQL服务器版本相对应的手册，以在':: date）附近使用正确的语法-整数'30'AND i.customer_id = o.customer_id group by o.custome在第7行

这是我运行的代码。

select 
o.customer_id, 
o.purchase_time
from orders as o
join orders as i on 
i.purchase_time <= o.purchase_time AND
i.purchase_time >= (o.purchase_time :: date) - integer '30' AND
i.customer_id = o.customer_id
group by o.customer_id, o.purchase_time;

Answer 1

我怀疑这是您想要的MySQL语法：

select o.*
from orders o
where exists (select 1
              from orders o2
              where o2.customer_id = o.customer_id and
                    o2.purchase_time > o.purchase_time and
                    o2.purchase_time <= purchase_time + interval 30 day
            );

SQL中的保留分析

1 个答案: