select rows in sql with latest date for each ID repeated multiple times [duplicate]

问题

I have a table where each ID is repeated 3 times. there is a date in front of each id in each row.
I want to select entire row for each ID where date is latest. There are total 370 columns in this table i want all columns to get selected when i select that row.

Sample -

ID   Name    Date        Marks    ..    ..  ..   
1     XY     4/3/2017     27
1     fv     4/3/2014     98
1     jk     4/3/2016     09
2     RF     4/12/2015    87
2     kk     4/3/2009     56
2     PP     4/3/2011     76
3     ee     4/3/2001     12
3     ppp    4/3/2003     09
3     lll    4/3/2011     23

The Answer should be

ID   Name    Date        Marks    ..    ..  ..   
1     XY     4/3/2017     27      
2     RF     4/12/2015    87
3     lll    4/3/2011     23

I am attempting as below -

select distinct ID,*,max(date) as maxdate from table

Also i am trying this in Hive . so not sure if some sql functions dont work in Hive

Thanks

回答1:

This question has been asked before. Please see this question.

Using the accepted answer and adapting it to your problem you get:

SELECT tt.*
FROM myTable tt
INNER JOIN
    (SELECT ID, MAX(Date) AS MaxDateTime
    FROM myTable
    GROUP BY ID) groupedtt 
ON tt.ID = groupedtt.ID 
AND tt.Date = groupedtt.MaxDateTime

回答2:

One way is:

select table.* 
from table
join 
(
    select ID, max(Date) as max_dt 
    from table
    group by ID
) t
on table.ID= t.ID and table.Date = t.max_dt

Note that if you have multiple equally higher dates for same ID, then you will get all those rows in result

回答3:

You can use a join to do this

SELECT t1.* from myTable t1
LEFT OUTER JOIN myTable t2 on t2.ID=t1.ID AND t2.`Date` > t1.`Date`
WHERE t2.`Date` IS NULL;

Only rows which have the latest date for each ID with have a NULL join to t2.

回答4:

Here's one way. The inner query gets the max date for each id. Then you can join that back to your main table to get the rows that match.

select
*
from
<your table>
inner join 
(select id, max(<date col> as max_date) m
where yourtable.id = m.id
and yourtable.datecolumn = m.max_date)

回答5:

You can do this with a Correlated Subquery (That is a subquery wherein you reference a field in the main query). In this case:

SELECT * 
FROM yourtable t1
WHERE date = (SELECT max(date) from yourtable WHERE id = t1.id)

Here we give the yourtable table an alias of t1 and then use that alias in the subquery grabbing the max(date) from the same table yourtable for that id.

回答6:

Have you tried the following:

SELECT ID, COUNT(*), max(date)
FROM table 
GROUP BY ID;

来源：https://stackoverflow.com/questions/45381743/select-rows-in-sql-with-latest-date-for-each-id-repeated-multiple-times

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mysql

sql

Hive