求一个oracle pl/sql 记录表的例子 要求：例子中存在处理多行多列数据，正确并能够运行！！谢谢！！

declare type emp_table_type is table of emp%rowtype index by binary_integer; emp_table emp_table_type; cursor sa is select * from emp; begin open sa; fetch sa bulk collect into emp_table; close sa; for i in 1 .. emp_table.count l