Sort internal table

Sort the elements of a table.

Consider the following example, illustrating the sorting of a table (STUDENTS) in descending order based on the AGE field.

WORKING-STORAGE SECTION.
01 STUDENTS-GROUP.
    05 STUDENTS OCCURS 50 TIMES.
       10 FIRST-NAME PIC X(100).
       10 LAST-NAME  PIC X(100).
       10 AGE        PIC 99.
...
PROCEDURE DIVISION.
    SORT STUDENTS DESCENDING AGE.