1、
select a.*, b.*, c.*, d.*
  from a, b, c, d
 where a.id = b.id
   and a.name is not null
   and a.id = c.id(+)
   and a.id = d.id(+)
"(+)"所在位置的另一侧为连接的方向，
所以上面的例子1是左连接。
以下的例子2既是右连接。

2、
select a.*, b.*, c.*, d.*
  from a, b, c, d
 where a.id = b.id
   and a.name is not null
   and a.id(+) = c.id

OPEN l_sys_cur FOR lv_sql;

SET @s = concat('SELECT distinct ', @a , ' FIELD1  FROM ' , @b ,
      ' WHERE ' , IFNULL(@c,' 1=1 '));

PREPARE stmt3 FROM @s;
 EXECUTE stmt3;
 
 DEALLOCATE PREPARE stmt3;

oracle使用数组步骤:
1. 将传入的字符串通过P_UNPACK_LIST方法转换为数组.(lo_holiday_jan_upl即为数组)
   P_UNPACK_LIST(iv_jan__str, lv_delimiter, lo_holiday_jan_upl);
2. 传数组到另一个存储过程.
   P_MOD_MONTH(iv_year, 1, lo_holiday_jan_upl, iv_user_cd);
3. P_MOD_MONTH中使用数组: (将数组中的各个元素取出来插入到SD_HOLIDAY表)
FOR li_cnt IN 0 .. 9 LOOP
    IF iv_daystr(li_cnt) IS NOT NULL THEN
      INSERT INTO SD_HOLIDAY
        (HOLIDAY_INT_KEY,
         YEAR,
         MONTH,
         DAY,
         ENABLE_FLAG,
         CREATE_BY,
         CREATE_DATE,
         LAST_UPD_BY,
         LAST_UPD_DATE)
      VALUES
        (SEQ_HOLIDAY_INT_KEY.NEXTVAL,
         iv_year,
         iv_month,
         iv_daystr(li_cnt),
         1,
         iv_user_cd,
         ld_sys_date,
         iv_user_cd,
         ld_sys_date);
  END IF;

END LOOP;