http://www.bennadel.com/blog/579-sql-count-nullif-is-totally-awesome.htm
http://sqlfiddle.com/#!2/dc786/3/0
http://sqlfiddle.com/#!2/dc786/7
http://sqlfiddle.com/#!2/dc786/8
Kamis, 09 Oktober 2014
SQL NULL-IF USEFULL
Posted By:
Call me: Desta
On 15.27
In sql, trick, windows