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Grouping

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srikanthk
Starting Member

2 Posts

Posted - 2012-11-03 : 03:01:36

Hello every one,

Myself srikanth, very new to sql server programming. i am using SQL Server 2005. I need help on grouping the data present in a column using SQL.

Example:
Time in Minutes
10
15
16
20
23
24
30
31
I need to put above mentioned data as following form

Result:

Range (Num)
<10 (0)
10-20 (4)
20-30 (3)
>30 (1)

Regards,
srikanth

sunitabeck
Master Smack Fu Yak Hacker

5155 Posts

Posted - 2012-11-03 : 08:29:52

Should be able to do with something like this:

SELECT
	CASE 
		WHEN col1 < 10 THEN CAST('<10' AS VARCHAR(10))
		WHEN col1 < 20 THEN '10-20'
		WHEN col1 < 30 THEN '20-30'
		ELSE '>30'
	END AS [Range],
	COUNT(*) AS [Num]
FROM
	YourTable
GROUP BY
	CASE 
		WHEN col1 < 10 THEN CAST('<10' AS VARCHAR(10))
		WHEN col1 < 20 THEN '10-20'
		WHEN col1 < 30 THEN '20-30'
		ELSE '>30'
	END

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-11-03 : 21:47:25

i would prefer putting ranges into a table of its own with boundary values so that it would be maintainable moving forward. This will give you ability to redefine ranges and add/remove ranges by means of DML statements to table rather than changing CASE WHEN inside procedure each time. The procedure will just have a join to this table on condition like


...
ON value BETWEEN startval AND endval
..

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

srikanthk
Starting Member

2 Posts

Posted - 2012-11-04 : 23:31:37

@sunitabeck, Thank you for replying. code is working perfectly.
@visakh16, Thank you for suggetion.

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