sql server 2008 deleting duplicates -

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मेरे पास ऐसा डुप्लिकेट है 

  col1, col2 1, alex 1, alex 2, Liza 2, liza 3, peter 3, peter   
 वहां केवल दो ही हैं मैं डुप्लिकेट कैसे हटाऊं?   
 
 
  साथ में क्यू एएस (SELECT *, ROW_NUMBER) (यहां पर कॉल 1, कॉल 2 ऑर्डर द्वारा कॉल 1, कोला 2) एआरएन एफ आर मायबॉलेट के रूप में) क्यू जहां आरएनटी = 2   
 से हटाएं:  
     
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