oracle存儲過程游標循環

CREATE OR REPLACE PROCEDURE sp_sync_plan IS 
  CURSOR C_EMP IS --聲明顯式游標  
    SELECT * FROM dc_check_todo;  
  C_ROW C_EMP%ROWTYPE; --定義游標變量，該變量的類型為基於游標C_EMP的記錄  
BEGIN 
  --For 循環  
  FOR C_ROW IN C_EMP LOOP  
    DBMS_OUTPUT.PUT_LINE(C_ROW.todo_id || '--' );  
  END LOOP;  
 
  --Fetch 循環  
  OPEN C_EMP;--必須要明確的打開和關閉游標  
  LOOP  
    FETCH C_EMP  
      INTO C_ROW;  
    EXIT WHEN C_EMP%NOTFOUND;  
    DBMS_OUTPUT.PUT_LINE(C_ROW.todo_id || '++' );  
  END LOOP;  
  CLOSE C_EMP;  
 
  --While 循環  
  OPEN C_EMP;--必須要明確的打開和關閉游標  
    FETCH C_EMP INTO C_ROW;  
    WHILE C_EMP%FOUND LOOP  
      DBMS_OUTPUT.PUT_LINE(C_ROW.todo_id || '**' );  
      FETCH C_EMP INTO C_ROW;  
    END LOOP;  
  CLOSE C_EMP;  
END sp_sync_plan;