How copy the data from one column to another column in the same table with different data type in oracle -


I want to copy from Visitors vistorARised VARCHAR2 (11) column to Visitor number (data) 5) What pillar can someone help? 

  change table & lt; Table & gt; Add visitor numbers (5); Update & lt; Table & gt; Set visitors = visited; Table & lt; Table & gt; Visited the drop column;   
 Of course, this approach fails if visit authorizes non-numeric values.  
 Alternatively, you want to use, but clearly, my experience with it was very positive, at least 11i (see for example)

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