获取每组的最新记录 - mysql（按最大日期/最大主键）

Question

id	orderid	assignedto	date
101	2001	1400	11, June 2020
102	2001	1560	16, June 2021
103	3450	1560	19, June 2020

Desired result -

id	orderid	assignedto	date
102	2001	1560	16, June 2021
103	3450	1560	19, June 2020

For each order id I want the last person who was assigned to the order.

My current query retrieves data by joining other fields as -

select y.id, x.orderid, assigneedto, date from (select id, orderid, date as date_rejected 
from tbl1
where status = 'A') x 
left join tbl1 as y
on x.orderid = y.orderid 
where y.status = 'B' and x.date_rejected > y.date

I tried using max(date) and grouping by orderid but the results are incorrect.

Answer 1

It's very complicated to understand what do you mean as tables are different from query, but I guess OVER PARTITION BY function will definitely resolve your issue, even without left join. https://dev.mysql.com/doc/refman/8.0/en/window-functions-usage.html