http://msdn.microsoft.com/en-us/library/gg309600.aspx
Contains nice code to retrieve multiple.
http://www.bennadel.com/blog/32-Getting-Group-By-Count-In-Left-Outer-Join.htm
http://forums.devshed.com/mysql-help-4/left-join-count-not-returning-rows-with-0-results-519406.html
SELECT
t.id,
t.name,
( ISNULL( COUNT(r.id), 0 ) ) AS reward_count,
( ISNULL( SUM(r.price), 0 ) ) AS price_sum,
( 0 ) AS reward_count_percent,
( 0 ) AS price_sum_percent
FROM
vendor_type t
LEFT OUTER JOIN
vendor_vendor_type_jn vtjn
ON
t.id = vtjn.vendor_type_id
LEFT OUTER JOIN
@reward r
ON
vtjn.vendor_id = r.vendor_id
GROUP BY
t.id,
t.name
FROM Counties
LEFT OUTER
JOIN Advertisers
ON Advertisers.County_Code = Counties.County_Code
AND Advertisers.Sub_Category_Code = '1110'
http://technet.microsoft.com/en-us/library/gg509060.aspx
http://a33ik.blogspot.com/2012/03/extended-handling-of-save-events-in.html
http://howto-mscrm.blogspot.com/search?updated-max=2011-04-23T08:58:00-07:00&max-results=7 (Ribbon Customizations)
How To – Series 7: How To override(Enable, Disable, Show, Hide, Custom Logic) Out of the Box HomePageGrid ribbon elements – CRM 2011
http://howto-mscrm.blogspot.com/2011/04/how-to-series-6-how-to-overrideenable.html
http://social.microsoft.com/Forums/zh/crmdevelopment/thread/d11eec16-06cf-46d9-8831-8798166cc555
http://social.microsoft.com/Forums/is/crmdevelopment/thread/04d357e2-847d-45af-bc34-f4f265fe1bbb
http://social.microsoft.com/Forums/en/crmdevelopment/thread/c99c91ea-e7cc-41b3-9b90-a9c56690185e
http://social.microsoft.com/Forums/en/crmdevelopment/thread/f501c019-aa7f-4d78-8390-5f11d1dd8820