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

Question

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

User · Answer

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.

User · Answer

Have you tried the following   SELECT ID  COUNT     max date  FROM table  GROUP BY ID

User · Answer

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   gt  t1  Date  WHERE t2  Date  IS NULL    Only rows which have the latest date for each ID with have a NULL join to t2

User · Answer

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

User · Answer

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

User · Answer

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  lt your table gt  inner join   select id  max  lt date col gt  as max date  m where yourtable id   m id and yourtable datecolumn   m max date

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

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