I need select data in SQL Server. I have a Data example like this
DECLARE @tblA TABLE (ID int, SubId int, Createdate DateTime)
INSERT INTO @tblA VALUES (1, 1, '10/21/2020')
, (2, 1, '10/21/2020')
, (3, 1, '10/27/2020')
, (4, 2, '10/21/2020')
, (5, 2, '10/21/2020')
, (6, 1, '10/21/2020')
, (7, 2, '10/23/2020')
, (8, 2, '10/22/2020')
, (9, 1, '10/25/2020')
, (10, 3, '10/21/2020')
I want to get 4 records (in table will have a lot of SubId) 2 records latest date by SubId = 1 2 records latest date by SubId = 2 Following example, I expect Select with like table Output
DECLARE @tblOutput Table (ID int, SubId int, Createdate DateTime)
INSERT INTO @tblOutput VALUES (3, 1, '10/27/2020')
, (9, 1, '10/25/2020')
, (7, 2, '10/23/2020')
, (8, 2, '10/22/2020')
“tooltip”
I try with Union but It’s only Order after Union. It’s not the result I want.
Please, Help me to select this. Thank you.
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Answer
You can use the Row_Number() function as shown below:
Create table tblA (ID int, SubId int, Createdate DateTime)
Insert Into tblA values (1, 1, '10/21/2020')
, (2, 1, '10/21/2020')
, (3, 1, '10/27/2020')
, (4, 2, '10/21/2020')
, (5, 2, '10/21/2020')
, (6, 1, '10/21/2020')
, (7, 2, '10/23/2020')
, (8, 2, '10/22/2020')
, (9, 1, '10/25/2020')
, (10, 3, '10/21/2020')
select Id
, SubId
, Createdate
from(
select *
, Row_Number() Over (Partition By SubId order by Createdate desc) as RNo
from tblA
)temp where RNo <= 2 and SubId in (1, 2)
Order by SubId