plsql 案例練習

1、練習記錄、集合的使用。

2、一行變多行，即實現以下效果：

 

---

-- 創建測試數據
create table test0606 (
loc number,
start_date date,
end_date date
);

insert into test0606 (loc,start_date,end_date) values
    (9,to_date('2020/01/01','yyyy/mm/dd'),to_date('2020/01/31','yyyy/mm/dd'));
    
insert into test0606 (loc,start_date,end_date) values
    (9,to_date('2020/04/01','yyyy/mm/dd'),to_date('2020/04/28','yyyy/mm/dd'));

select * from test0606;



-- 輸出結果

set serveroutput on;

declare
  cursor c_test0606 is select loc,start_date,end_date from test0606;
  type test0606_type is record (
    loc number,
    start_date date,
    end_date date,
    iter_date date
  );
  test0606_rec test0606_type;
  type test_table_type is table of test0606_rec%type index by pls_integer;
  test_table_tab test_table_type;
  iter_date date;
  v_index pls_integer:= 1;
begin 
  for c_test0606_s in c_test0606
  loop
    iter_date := c_test0606_s.start_date;
    dbms_output.put_line(c_test0606_s.loc);
    dbms_output.put_line(c_test0606_s.start_date);
    dbms_output.put_line(c_test0606_s.end_date);
    while iter_date<=c_test0606_s.end_date
    loop
      dbms_output.put_line(c_test0606_s.loc);
      dbms_output.put_line(c_test0606_s.start_date);
      dbms_output.put_line(c_test0606_s.end_date);
      dbms_output.put_line(iter_date);
      
      --數據放到定義好的記錄中
      test0606_rec.loc :=  c_test0606_s.loc;
      test0606_rec.start_date := c_test0606_s.start_date;
      test0606_rec.end_date := c_test0606_s.end_date;
      test0606_rec.iter_date := iter_date;
      --將記錄放到關聯數組中
      test_table_tab(v_index) := test0606_rec;
      iter_date := iter_date + 1;
      v_index := v_index + 1;
      
    end loop;
  end loop;
  
  --打印記錄集合
  for i in 1..test_table_tab.count
  loop
    dbms_output.put_line(i);
    dbms_output.put_line(test_table_tab(i).loc);
    dbms_output.put_line(test_table_tab(i).start_date);
    dbms_output.put_line(test_table_tab(i).end_date);
    dbms_output.put_line(test_table_tab(i).iter_date);
    
  end loop;

end;