Question

我需要设置一个查询来运行每个销售团队的销售报表。以下简化模型涉及三个表。

SQL FIDDLE HERE：http://sqlfiddle.com/#!9/b09b3a/

**users_table**
id     name
1      John Doe


**sales_team**
user_id       sales_team             date_joined_team
1             Sales team 1           Jan 1st
1             Sales team 2           Jan 5th
1             Sales team 3           Jan 10th
1             Sales team 2           Jan 15th

**transactions**
user_id        transaction_date  amount
1              Jan 2nd           20.00
1              Jan 3rd           10.00
1              Jan 7th           15.00
1              Jan 11th          13.00
1              Jan 16th          5.00

我需要在交易表上加入合适的销售团队，使用每个交易的用户ID和最低可能的date_joined团队，大于transaction_date

**desired results**
sales_team                date            amount
Sales team 1              Jan 2nd         20.00
Sales team 1              Jan 3rd         10.00
Sales team 2              Jan 7th         15.00
Sales team 3              Jan 11th        13.00
Sales team 2              Jan 16          5.00

我没有要求整个查询，只是根据小于某个指定日期的最高日期加入数据的一些帮助。

谢谢！

Answer 1

这样的事情：

select date, amount, (
    select st.sales_team
    from sales_team st
    where st.user_id = t.user_id
      and st.date_joined_team < t.date
    order by st.date_joined_team desc
    limit 1) as sales_team
from transactions t

如果您真的想要＆lt;＃strong; 最低可能的date_joined团队更强而不是transaction_date＆＃34;，请更改

      and st.date_joined_team < t.date
    order by st.date_joined_team desc

到

      and st.date_joined_team > t.date
    order by st.date_joined_team asc

根据最低发生值构建表和连接记录

1 个答案: