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Nested Select with Count

Author

Topic

smifsud
Starting Member

2 Posts

Posted - 2009-01-26 : 07:49:49

I am very new to SQL so please forgive if this query is very easy.

I need to get information out of one table about who is deal with an issue. Up to three people can be dealing with an issue but I need a single figure for how many issues are being dealt with by person X. I will explain with a sample table.

Job - Person 1 - Person 2 - Person 3
----------------------------------------------------
Painting - Tony - Dave - Paul
Cleaning - Steve - Tony - Dave
Sweeping - Dave - Paul
DIY - Tony - Dave

Desired Output
-----------------
Tony - 3
Dave - 4
Paul - 2
Steve - 1

I can do the count on one field but do not know how to nest a query and get only one result.

I hope that someone can help.

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2009-01-26 : 08:04:25

[code]SELECT Person,
COUNT(*)
FROM (
SELECT Person1 AS Person
FROM Table1

UNION ALL

SELECT Person2 AS Person
FROM Table1

UNION ALL

SELECT Person3 AS Person
FROM Table1
) AS d
GROUP BY Person[/code]

E 12°55'05.63"
N 56°04'39.26"

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-01-26 : 08:19:38

If sql 2005


SELECT Name,
COUNT(Job) 
FROM (SELECT * FROM YourTable)m
UNPIVOT(Name FOR Person IN ([Person 1],[Person 2],[Person 3]))u
GROUP BY Name

smifsud
Starting Member

2 Posts

Posted - 2009-01-26 : 09:23:21

Peso, you are a genius – exactly what I wanted.

Thank you

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