oracle從游標批量提取數據

來源於：http://blog.csdn.net/ceclar123/article/details/7974973

 

傳統的fetch into一次只能取得一條數據，使用fetch bulk collect into可以一次從游標中取得所有數據，使用limit子句可以限制一次取的數據條數

1、fetch bulk collect into

begin
  declare
    cursor c_dept is select * from dept;
    type dept_record is table of dept%rowtype;
    v_dept dept_record;
  begin
    open c_dept;
    fetch c_dept bulk collect into v_dept;
    close c_dept;
    for i in 1.. v_dept.count loop
        dbms_output.put_line('部門名稱：'||v_dept(i).dname||'   部門地址：'||v_dept(i).loc);
    end loop;
  end;
end;

2、使用limit子句限制提取的行數

begin
  declare
    cursor c_dept is select * from dept;
    type dept_record is table of dept%rowtype;
    v_dept dept_record;
  begin
    open c_dept;
    loop
      exit when c_dept%NOTFOUND;
      fetch c_dept bulk collect into v_dept limit 3;
      dbms_output.put_line('-----------------------------------------------------------');
        for i in 1.. v_dept.count loop
            dbms_output.put_line('部門名稱：'||v_dept(i).dname||'   部門地址：'||v_dept(i).loc);
        end loop;
    end loop;
    close c_dept;
  end;
end;