用ROLLUP改写sql

原语句如下（其中bb为with()语句里的内容）:

select bb.dept_code,
       bb.dept_name,
       '0000000001',
       '小计',
       sum(bb.tot_cost) 金额
  from bb
 group by bb.dept_code, bb.dept_name
UNion all
select bb.dept_code,
       bb.dept_name,
       '0000011111',
       '1',
       sum(bb.tot_cost)
  from bb
 where (bb.code = '001' or bb.code = '002' OR bb.code = '003')
 group by bb.dept_code, bb.dept_name
union all
select bb.dept_code,
       bb.dept_name,
       bb.code,
       bb.fee_stat_name,
       sum(bb.tot_cost)
  from bb
 where (bb.code = '001' or bb.code = '002' OR bb.code = '003')
 group by bb.dept_code, bb.dept_name, bb.code, bb.fee_stat_name
union all
select bb.dept_code, bb.dept_name, '01111111', '2', sum(bb.tot_cost)
  from bb
 where (bb.code <> '001' and bb.code <> '002' and bb.code <> '003')
 group by bb.dept_code, bb.dept_name
union all
select bb.dept_code,
       bb.dept_name,
       bb.fee_stat_cate,
       bb.fee_stat_name,
       sum(bb.tot_cost)
  from bb
 where (bb.code <> '001' AND bb.code <> '002' AND bb.code <> '003')
 group by bb.dept_code,
          bb.dept_name,
          bb.fee_stat_cate,
          bb.fee_stat_cate,
          bb.fee_stat_name

首先对bb处理如下，实际上就是改写下with语句

ALTER TABLE BB ADD tt VARCHAR2(50)
UPDATE BB SET tt = (CASE
                 WHEN (BB.CODE = '001' OR BB.CODE = '002' OR BB.CODE = '003') THEN
                  '1'
                 WHEN (BB.CODE <> '001' AND BB.CODE <> '002' AND
                      BB.CODE <> '003') THEN
                  '2'
               END)
update BB set code = fee_stat_cate where  tt = '2'
SELECT * FROM BB
alter table bb drop column fee_stat_cate

改写后的语句如下

SELECT BB.DEPT_CODE ,
       BB.DEPT_NAME ,
       CASE
         WHEN GROUPING(CODE) = 1 AND GROUPING(tt) = 1 THEN
          '0000000001'
         WHEN GROUPING(CODE) = 1 AND tt = '1' THEN
          '0000011111'
         WHEN GROUPING(CODE) = 1 AND tt = '2' THEN
          '01111111'
         ELSE
          BB.CODE
       END AS CODE,
       CASE
         WHEN GROUPING(CODE) = 1 AND GROUPING(tt) = 1 THEN
          '小计'
         WHEN GROUPING(CODE) = 1 THEN
          tt
         ELSE
          BB.FEE_STAT_NAME
       END AS fy,
       SUM(BB.TOT_COST) 金额
  FROM BB
 GROUP BY DEPT_CODE,
          DEPT_NAME,
          ROLLUP(tt, ( CODE, FEE_STAT_NAME))
 ORDER BY GROUPING(tt) DESC,
          tt,
          GROUPING(CODE) DESC,
          3,
          4,
          2