Answer Posted / nagaraju

Fitst. and Last. varibles are logical variables and returns
1 & 0 values.
These are mailnly used to give the first and last
occurances from the table.

ex: employee table having (1-100 employees) -- uses

if we give first.empid=1 then it gives only first employee
details
if we give first.empid=0 then it gives remaining employee
details except first one

in the same way

if we give last.empid=1 then it gives last employee details
if we give last.empid=0 then it gives remaining employee
details except last one
hope this is clear

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