I am trying to create a reporting query where I SUM up all the amounts in the database for all 12 mont and come up with a result even if there isn't an amount totalled. I created a table called monthsInYear that has the ID (unique identifier) 1-12 and the months Jan - Dec. I want to SUM up the amounts per month and come up with 12 results (one per month).
I tried the query below but it only comes up with 1 month and all the amounts totalled to it.
| March | 484714.13 |
I am using:
SELECT monthsInYear.month, IFNULL( SUM(income.amount), 0 ) AS amount
FROM monthsInYear
LEFT OUTER JOIN income ON EXTRACT(MONTH FROM income.dateAdded) = monthsInYear.monthID
WHERE income.orgID = 10031
AND YEAR(income.DateAdded) = '2011'
ORDER BY EXTRACT(MONTH FROM income.dateAdded) ASC
Can anyone tell me what I am doing wrong. I would much much prefer something like:
January 3000
February 3000
March 4000
April 0
May 5000
June 6000
July 5465
....
Ok...maybe not. Seems the IFNULL isn't working. I have a view 'getExpenses' that unions a bunch of sources to produce a list of expenses. The view works perfectly
But when I run this, it gives me total for only the months that have a total and not the 0 for the ones that come up as null. Any ideas?
SELECT monthsInYear.month, monthsInYear.monthID,IFNULL(Sum(getExpenses.cost), 0 ) AS amount
FROM monthsInYear, getExpenses
WHERE EXTRACT(MONTH FROM getExpenses.dateAdded) = monthsInYear.monthID
AND getExpenses.orgID = 10031
AND YEAR(getExpenses.DateAdded) = '2011'
GROUP BY monthsInYear.month, monthsInYear.monthID
ORDER BY monthsInYear.monthID ASC
Also tried
SELECT m.month, IFNULL( SUM(i.cost), 0 ) AS amount
FROM getExpenses i LEFT OUTER JOIN monthsInYear m
ON m.monthID = EXTRACT(MONTH FROM i.dateAdded)
WHERE orgID = 10031
AND YEAR(i.dateAdded) = '2011'
GROUP BY m.month
ORDER BY EXTRACT(MONTH FROM i.dateAdded) ASC
WHEN I DO a direct query, it does come up as NULL (Since there is no value for April)
SELECT SUM(cost) FROM getExpenses
WHERE EXTRACT(MONTH FROM dateAdded) = '4'
AND orgID = 10031
Didn't change the results unless I am missing something
SELECT m.month, m.monthID, IFNULL(SUM(e.cost), 0) AS amount
FROM getExpenses e LEFT JOIN monthsInYear m
ON m.monthID = EXTRACT(MONTH FROM e.dateAdded)
WHERE e.orgID = 10031
AND YEAR(e.dateAdded) = '2011'
GROUP BY m.month, m.monthID
ORDER BY EXTRACT(MONTH FROM e.dateAdded) ASC
| June | 6 | 95.00 |
| July | 7 | 1015.00 |
| August | 8 | 272.00 |
| October | 10 | 105.00 |
| December | 12 | 100.00 |
Hi
As Dan Baruk rightly said try something like below
SELECT m.month, m.monthID, IFNULL(SUM(e.cost), 0) AS amount
FROM monthsInYear m
LEFT JOIN getExpenses e ON m.monthID = EXTRACT(MONTH FROM e.dateAdded)
WHERE e.orgID = 10031
AND YEAR(e.dateAdded) = '2011'
GROUP BY m.month, m.monthID
ORDER BY EXTRACT(MONTH FROM e.dateAdded) ASC
Here is a got article related to joins
http://www.devx.com/dbzone/Article/17403/1954
Regards
Sreekar
Sreeindia wrote:
As Dan Baruk rightly said try something like below
SELECT m.month, m.monthID, IFNULL(SUM(e.cost), 0) AS amount
FROM monthsInYear m
LEFT JOIN getExpenses e ON m.monthID = EXTRACT(MONTH FROM e.dateAdded)
WHERE e.orgID = 10031
AND YEAR(e.dateAdded) = '2011'
GROUP BY m.month, m.monthID
ORDER BY EXTRACT(MONTH FROM e.dateAdded) ASC
I think it is sufficient to group by just one column, using the table to the left of the join, like this:
SELECT m.month, m.monthID, IFNULL(SUM(e.cost), 0) AS amount
FROM monthsInYear m
LEFT JOIN getExpenses e ON m.monthID = EXTRACT(MONTH FROM e.dateAdded)
WHERE e.orgID = 10031
AND YEAR(e.dateAdded) = '2011'
GROUP BY m.monthID
ORDER BY m.monthID ASC
But when I run this, it gives me total for only the months that have a total and not the 0 for the ones that come up as null. Any ideas?....
Also tried
SELECT m.month, IFNULL( SUM(i.cost), 0 ) AS amount
FROM getExpenses i LEFT OUTER JOIN monthsInYear m
ON m.monthID = EXTRACT(MONTH FROM i.dateAdded)
WHERE orgID = 10031
AND YEAR(i.dateAdded) = '2011'
GROUP BY m.month
ORDER BY EXTRACT(MONTH FROM i.dateAdded) ASC
There are two problems. First, the tables in your join are reversed. A LEFT JOIN returns all records from the left hand table (expenses) even if there are no matching records in the right hand table. What you want is the opposite. So the months table must on be on the left side of the JOIN:
...
FROM monthsInYear m LEFT JOIN getExpenses i ON m.monthID = EXTRACT(MONTH FROM i.dateAdded)
Second, when there is no matching expense record, the column values will all be null. So as soon as you use one of the expense fields in your WHERE clause, ie
WHERE i.orgID = 10031
AND YEAR(i.dateAdded) = '2011'
... those missing records are dropped, because a null value is never equal to anything. So you are negating the outer join altogether. You need to move those conditions into the JOIN clause instead:
SELECT m.month, IFNULL( SUM(i.cost), 0 ) AS amount
FROM monthsInyear m LEFT OUTER JOIN getExpenses i
ON m.monthID = EXTRACT(MONTH FROM i.dateAdded)
AND i.orgID = 10031
AND YEAR(i.dateAdded) = 2011
GROUP BY m.month
ORDER BY m.month
North America
Europe, Middle East and Africa
Asia Pacific