Yesterday I went to an Interview, Interviewer has asked me a strange question where I couldn’t give him perfect answer. Question is here
1. Why do we need to use Left and Right Outer joins? Though you can swap tables name while using any one outer join.
Can you please give me your answer

thanks
Sandeep

Is there some free tool available on the net that will convert the syntax of *= & =* queries to LEFT & RIGHT OUTER JOIN?
Actually in my Project there are many such occurences where I will have to convert them manually.It will consume my development and testing efforts.Please suggest me if any such tool is available.

Thanks in Advance!!

If you remove the WHERE clause, do you get all of them?

where pm.type=’product’ and DATEPART(YEAR, sd.deliverydate) = ’2009′
and DATEPART(Month, sd.deliverydate) = ’1′

group by pm.product_name,ps.productid

I am not getting all productname

select distinct pm.product_name,ps.productid,sum(ps.price)price from product_master pm
left outer join productsales ps on ps.productid=pm.product_id
left outer join salesdetail sd on sd.id=ps.salesid

where pm.type=’product’ and DATEPART(YEAR, sd.deliverydate) = ’2009′
and DATEPART(Month, sd.deliverydate) = ’1′

group by pm.product_name,ps.productid

I am not getting all product names
please help me

right now we are migrating out application from sql server 2000 to sql server 2005. we got Outer Join (*= and =*) issues and we modified those. Is there any issues other than this when migrating from from sql server 2000 to sql server 2005?

Thanks in advance.

We’ve came across the similiar situations and we’re able to fix it. Please try this…

SELECT sum(a.clicks) as clicks, j.linksid, j.location, j.subcategory
FROM aggregatelinkcounts as a
LEFT OUTER JOIN
(select l.linksid, l.sustomersid, s.subcategory, h.location
from l
LEFT OUTER JOIN subcategories as s ON l.subcategoryid = s.id
LEFT OUTER JOIN locations as h ON l.locationsid = h.locationsid ) as j
ON a.linkID = j.linksid
WHERE j.customersid = 44
AND a.date >= ‘2007/1/1′
AND a.date <= ‘2008/1/1′
GROUP BY j.linksID, j.subcategory, j.location
ORDER BY j.subcategory, j.location

Good luck.

Jackie

I’m having trouble with an outer join query using SQL Server 2005.

SELECT sum(a.clicks) as clicks, l.linksid, h.location, s.subcategory
FROM aggregatelinkcounts as a
LEFT OUTER JOIN links as l ON a.linkID = l.linksID
LEFT OUTER JOIN subcategories as s ON s.id = l.subcategoryid
LEFT OUTER JOIN locations as h ON h.locationsid = l.locationsid
WHERE l.customersid = 44
AND a.date >= ’2007/1/1′
AND a.date <= ’2008/1/1′
GROUP BY l.linksID, s.subcategory, h.location
ORDER BY s.subcategory, h.location

The table Links has more occurrences of linkID than aggregatelinkcounts and so ‘clicks’ should have zeros showing up on those result rows with no inner join.

I understand that SQL 2005 doesn’t do this correctly. Is there a tweak or something I can do to make this query work correctly?