title: Update multiple rows with different values in SQL
body: <p>I have a table like this :-</p>
  
  <pre>
  Product ID            Weight
  A                     100
  B                     100
  C                     100
  D                     100
  E                     100 
  </pre>
  
  <p>I want to change it to:-</p>
  
  <pre>
  Product ID            Weight
  A                     501
  B                     601
  C                     701
  D                     801
  E                     401 
  </pre>
  
  <p>How can I do that with SQL update command ??</p>