Select row name with max date with grouping - sql

Question

For example:
create table #t
(
[ID] int,
[Date] date,
[Name] varchar(5)
)
insert into #t
values
(1, getdate(),'1-1'),
(2, dateadd(D,-10,getdate()),'2-1'),
(2, dateadd(D,-5,getdate()),'2-2'),
(1, dateadd(M,-1,getdate()),'1-2')
select * from #t
I need to select [Name] for each [ID] with max [Data].
Something like this:
select [1], [2]
from ( select ID, [Date] from #t ) y
pivot (
max(y.[Date])
for y.ID in ([1],[2])
) pvt;
Output:
1 2
2017-04-28 2017-04-23
but instead of [Date] i want to see [Name]
what i want to view
1 2
1-1 2-2
Please help. Thank you.

Answer 1

Please try the following code
create table #t
(
[ID] int,
[Date] date,
[Name] varchar(5)
)
insert into #t
values
(1, getdate(),'1-1'),
(2, dateadd(D,-10,getdate()),'2-1'),
(2, dateadd(D,-5,getdate()),'2-2'),
(1, dateadd(M,-1,getdate()),'1-2')
select [1], [2]
from ( select ID, [Name] from #t ) y
pivot (
max(y.[Name])
for y.ID in ([1],[2])
) pvt;
drop table #t

Answer 2

You can use row_nubmber() with date desc and pivot as below:
;with cte as (
select id, RowN = row_number() over (partition by id order by date desc), name from #t
) select * from
(select id, name from cte where rown = 1 ) s
pivot (max(name) for id in ([1],[2])) p

Answer 3

You can try the following :
SELECT [1], [2]
FROM (SELECT y.ID,
t.Name
FROM (SELECT ID,
MAX([Date]) AS [Date]
FROM #t
GROUP BY ID ) y
INNER JOIN #t t ON y.[Date] = t.[Date]
) x
PIVOT
(
MAX(x.Name)
FOR x.ID IN ([1],[2])
) pvt;
You can see this here -> http://rextester.com/ZGQGSC94965
Hope this helps!!!

Answer 4

try this one.
CREATE TABLE #t
(
[ID] INT ,
[Date] DATE ,
[Name] VARCHAR(5)
)
INSERT INTO #t
VALUES (1, getdate(),'1-1'),
(2, dateadd(D,-10,getdate()),'2-1'),
(2, dateadd(D,-5,getdate()),'2-2'),
(1, dateadd(M,-1,getdate()),'1-2')
SELECT *
FROM #t;
WITH CTE
AS ( SELECT ID ,
MAX(Date) [Date]
FROM #t
GROUP BY ID
),
CTE2
AS ( SELECT cte.ID ,
cte.Date ,
t.name
FROM CTE
OUTER APPLY ( SELECT TOP 1
name
FROM #t
WHERE (ID = cte.ID AND Date = cte.Date)
) T
)
SELECT MAX([1]) [1] ,
MAX([2]) [2]
FROM ( SELECT ID ,
[Date] ,
NAME
FROM CTE2
) y PIVOT ( MAX(y.NAME) FOR y.ID IN ( [1], [2] ) ) pvt
Result
ID Date Name
----------- ---------- -----
1 2017-05-02 1-1
2 2017-04-22 2-1
2 2017-04-27 2-2
1 2017-04-02 1-2
(4 row(s) affected)
1 2
----- -----
1-1 2-2
(1 row(s) affected)