group by statement complex

Question

2.60/5 (2 votes)

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SQL

SELECT Person.name, Sum(transaction.price) AS SumOfPrice
FROM Person RIGHT JOIN transaction ON Person.id = transaction.pID
GROUP BY Person.name
ORDER BY Person.name

[/edit]

Posted 16-Oct-13 5:36am

maysamfth

Updated 16-Oct-13 6:08am

v4

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phil.o 16-Oct-13 11:39am

Solution to what? If there is no record for sam in the transaction table, then it is not a bug that the sum appears as 0.
You could exclude zero-sums with the following statement
WHERE SUM(price) <> 0
Edit: having the SQL request you are using could be useful, too.

maysamfth 16-Oct-13 11:43am

thanks, this is my query: SELECT Person.name, Sum(transaction.price) AS SumOfPrice
FROM Person RIGHT JOIN transaction ON Person.id = transaction.pID
GROUP BY Person.name
ORDER BY Person.name

phil.o 16-Oct-13 11:48am

Please do not post your query in a comment as it is hardly readable.
Better edit (improve) your question and qualify it with relevant informations.

maysamfth 16-Oct-13 11:53am

i want that: all of person that saved in persons table whether has transaction or not, reported with query. if person have record in transaction table then sum of price be reproted, else if person have not record then zero be reported.

phil.o 16-Oct-13 11:55am

Then see my solution ; a LEFT JOIN should do the trick.

2 solutions

Solution 2

You can try:-

SQL

select Person.Name,sum(transaction.Price) as SumOfPrice from Person left outer join transaction 
on Person.ID=transaction.Pid group by Person.Name order by Person.Name

here for sam the SumOfPrice will be null

Posted 16-Oct-13 23:25pm

DDR-4

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phil.o · Accepted Answer · 2013-10-16T05:50:00

Solution 1

You could try with inversing your join:

SQL

SELECT Person.name, Sum(transaction.price) AS SumOfPrice
FROM Person LEFT JOIN transaction ON Person.id = transaction.pID
GROUP BY Person.name
ORDER BY Person.name

and see if it fits your needs.

Posted 16-Oct-13 5:50am

phil.o

Comments

maysamfth 16-Oct-13 12:00pm

thanks, but it dosent work. Your query delete all of records in person table that have no name.

phil.o 16-Oct-13 12:07pm

A SELECT query cannot delete anything. Try with INNER JOIN instead.

maysamfth 16-Oct-13 12:10pm

oh, no. in other wise it dont show all of records in person table that have no name!

phil.o 16-Oct-13 12:12pm

If you want persons without name you should include Person.id in the query.
But I think that if you have persons without any name in your table, there is still a problem ; that should not happen.

maysamfth 16-Oct-13 12:19pm

excuse me it work with LEFT JOIN! i forget remove a where statement! thanks