A new data type in Oracle 11g: SIMPLE_INTEGER

Prior to Oracle 11g, we have used PLS_INTEGER data type in PL/SQL programs. In 11g, a new data type SIMPLE_INTEGER has been introduced. It is a sub-type of PLS_INTEGER data type and has the same range as PLS_INTEGER. The basic difference between the two is that SIMPLE_INTEGER is always NOT NULL. Wh

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