What is the query to find nth highest salary?
What is the use of cursors?
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Answer Posted / ram
1. nth highest salary
-> select *from emp e where &n =(select count(distinct sal)
from emp m where e.sal <= m.sal);
2. -> Cursor.
When a query is executed in oracle, a result set is
produced and stored in the memory. Oracle allows the
programmer to access this result set in the memory through
cursors.
use a cursor?
Many times, when a query returns more than one row as a
result, we might want to go through each row and process
the data in different way for them. Cursor is handy here.
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