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SQL Select top frequent records

Tags:

sql

sql-server

I have the following table:

Table
+----+------+-------+
| ID | Name | Group |
+----+------+-------+
| 0  |   a  |   1   | 
| 1  |   a  |   1   | 
| 2  |   a  |   2   |
| 3  |   a  |   1   |
| 4  |   b  |   1   |
| 5  |   b  |   2   |
| 6  |   b  |   1   |
| 7  |   c  |   2   |
| 8  |   c  |   2   |
| 9  |   c  |   1   |
+----+------+-------+

I would like to select top 20 distinct names from a specific group ordered by most frequent name in that group. The result for this example for group 1 would return a b c ( a - 3 occurrences, b - 2 occurrences and c - 1 occurrence).

Thank you.

like image 308
Maksim Vi. Avatar asked Dec 18 '09 07:12

Maksim Vi.


2 Answers

SELECT TOP(20) [Name], Count(*) FROM Table
WHERE [Group] = 1
GROUP BY [Name]
ORDER BY Count(*) DESC
like image 125
Mark Byers Avatar answered Nov 12 '22 04:11

Mark Byers


SELECT Top(20) 
   name, group, count(*) as occurences
FROM yourtable
GROUP BY name, group
ORDER BY count(*) desc
like image 39
Markus Hi Avatar answered Nov 12 '22 04:11

Markus Hi