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Cursors vs. While loop - SQLServer

Say I have a bunch of rows in a DB (SQLServer 2008 in this case) that can be used to create equations.

 -----------------------------------------------------
 OperationID | EquationID | Operation | Amount | Order
 -----------------------------------------------------
     1       |     1      |     +     |   12   |  1 
     2       |     1      |     +     |   12   |  2 
     3       |     2      |     /     |   2    |  3 
     4       |     2      |     +     |   12   |  1 
     5       |     2      |     -     |   2    |  2 
 -----------------------------------------------------
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sql sql-server

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