Select distinct rows with max date in mysql 5.7 [duplicate]

问题

This question already has answers here:

SQL select only rows with max value on a column [duplicate] (27 answers)

Closed 7 months ago.

Suppose having query

SELECT c_id, id, max(date) as max_date FROM table
GROUP BY c_id,updated

And following result:

c_id, id, max_date
1     5   2017-12-28 16:09:20 
1     6   2019-12-28 16:09:20
2     7   2017-12-28 16:09:20
2     8   2019-12-28 16:09:20

I expect to get:

c_id, id, max_date 
1     6   2019-12-28 16:09:20
2     8   2019-12-28 16:09:20

How to achieve that in mysql 5.7?

回答1:

Use a correlated subquery:

select t.*
from t
where t.date = (select max(t2.date) from t t2 where t2.c_id = t.c_id);

来源：https://stackoverflow.com/questions/63287914/select-distinct-rows-with-max-date-in-mysql-5-7