Correct Answer: Cursors help you manipulate the information retrieved by select statements This can be done by assigning a name to the cursor Example: CURSOR emp_cur IS SELECT emp_number from employee_tbl where employee_name = name_in; Types of Cursors: Implicit cursors- These cursors are not declared by the programmer They are issued when the SQL statement is executed The open, close and fetching is done by itself Example: UPDATE employee SET salary = salary * 21; Here, an implicit cursor is issued to identify the set of rows in the table which would be affected by the update Explicit cursors- These cursors are defined by programmer They are used in queries that return multiple rows Example: CURSOR emp_cur IS SELECT emp_number from employee_tbl where employee_name = name_in;
