SQL查出异常数据（ORA-01722: 无效数字）

-- Created on 2015/4/29 by MENGHU 

DECLARE

  -- Local variables here

  I INTEGER;

BEGIN

  FOR OPEN_DATA IN (SELECT *

                      FROM SYS_DEPT_ACCOUNTING SDA

                     WHERE SDA.SEGMENT4 IS NOT NULL) LOOP

    BEGIN

      BEGIN

        SELECT TO_NUMBER(TRIM(SDA.SEGMENT4))

          INTO I

          FROM SYS_DEPT_ACCOUNTING SDA

         WHERE SDA.SEGMENT4 IS NOT NULL

           AND SDA.ACCOUNT_ID = OPEN_DATA.ACCOUNT_ID;

      EXCEPTION

        WHEN OTHERS THEN

          NULL;

          INSERT INTO TEMP_T1 (A1) VALUES (OPEN_DATA.ACCOUNT_ID);

      END;

    END;

  END LOOP;

END;

程序中进行数据转换时报错，需要查出具体的数据是哪条，可以通过以上测试存储过程查询。