sql injection upload file

[shutgun]

salutare, incerc sa invat sa ridic shell prin vulnerabilitatea sql injection,

am incercat mai multe tutoriale pe net fara nici un rezultat concret, stie sami zica si mie cineva cum ridic

shell prin sql injection ? uitati aici niste siteuri de exemplu practic :

http://homepagekatalog.net/getsite.php?siteid=4802'
http://bjzlth.net/?c=show2&m=view&id=146'
http://www.bkkgame.com/showgame.php?TypeID=8%2527A%3D0
http://www.blackdiamondradio.net/bdrscripts/track.php?id=1006'
http://blackhawkranch.net/support/kb/?p=961'
http://hongdaestyle.net/board/index.html?pcno=24'&mindex=9&PHPSESSID=4113d0aa976f779df7c729e372b45c4f
http://bootsbau.net/listcompany.php?firmenid=029dbc240c496202bd924c5e77fe65fa'
http://www.thereadingwarehouse.com/showbook.php?ISBN=9781604186833'&f=CD
http://borkumer-strandresidenz.net/index.php?page=8'
http://boroughs.org/subpage.php?link=CBO-Info'

Thanks All