<P> Notably, the Oracle platform provides a MINUS operator which is functionally equivalent to the SQL standard EXCEPT DISTINCT operator (1). </P> <P> The following example EXCEPT query returns all rows from the Orders table where Quantity is between 1 and 49, and those with a Quantity between 76 and 100 . </P> <P> Worded another way; the query returns all rows where the Quantity is between 1 and 100, apart from rows where the quantity is between 50 and 75 . </P> <P> The following example is equivalent to the above example but without using the EXCEPT operator . </P>

Explain implementation of set operation in query processing