Fetch single record from a table using SQL

Question

1.00/5 (1 vote)

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Hi,

I'm trying to write a query which will distinguish records from this table

No Date Flag
1 2016-10-31 Y
1 2016-11-30 Y
2 2014-10-31 Y
1 2015-10-31 Y
2 2013-10-31 Y
1 2012-10-31 Y
2 2011-10-31 Y
3 2016-08-31 Y
3 2016-01-31 Y
1 2016-03-31 Y
2 2015-10-31 Y
3 2014-10-31 Y

to this

No Date Flag
1 2016-11-30 Y
2 2015-10-31 Y
3 2016-08-31 Y

The only problem here is no primary key exists; should I fetch this record in a temp table and then try? Please suggest.

Thanks in advance.

What I have tried:

the above records I've shifted into a temp table; but no idea after that.

Posted 15-Feb-17 22:06pm

sahabiswarup

Updated 15-Feb-17 22:39pm

v2

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Karthik_Mahalingam 16-Feb-17 4:38am

not clear

1 solution

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Praneet Nadkar · Accepted Answer · 2017-02-15T22:39:00

Solution 1

Hi,

Try using Row_number here.

Like this :

SQL

;WITH CTE AS (
SELECT [NO],[DATE],FLAG
 ,ROW_NUMBER() OVER(PARTITION BY [NO] ORDER BY [DATE] DESC) AS ROW_NUM
FROM TABLE_NAME
)

SELECT [NO],[DATE],FLAG FROM CTE WHERE ROW_NUM = 1;

Posted 15-Feb-17 22:39pm

Praneet Nadkar

Comments

sahabiswarup 16-Feb-17 5:50am

Thanks for your valuable comment.

[no name] 16-Feb-17 6:01am

Happy to help