好吧,我想我已经有了解决方案.这些数字与你的数字有点不同,但我相当确定我的正在做你想要的.我们可以在第1步和第1步中完成所有工作. 2使用单个查询(main_sql).必须使用递归语句(recur_sql)完成3和4.

with main_sql as (

select a.*,

b.*,

sum(a_amt) over (partition by b_id) as cd_amt,

rank() over (partition by a_cd order by b_id) as rnk

from (select a_cd, a_flag, sum(a_amt) as a_amt

from tablea

group by a_cd, a_flag) a,

tableb b

where a.a_flag = case when b.b_flag = 'Y' then a.a_flag else b.b_flag end

order by b_id, a_cd

),

recur_sql (a_cd, b_id, total_amt, cd_amt, resulting_ratio, resulting_amt, rnk) as (

select m.a_cd,

m.b_id,

m.a_amt as total_amt,

m.cd_amt, m.a_amt / m.cd_amt as resulting_ratio,

m.a_amt + (m.a_amt / m.cd_amt * m.b_amt) as resulting_amt,

rnk

from main_sql m

where rnk = 1

union all

select m.a_cd,

m.b_id,

r.resulting_amt as total_amt,

m.cd_amt,

r.resulting_amt / m.cd_amt as resulting_ratio,

r.resulting_amt + (r.resulting_amt / m.cd_amt * m.b_amt) as resulting_amt,

m.rnk

from recur_sql r,

main_sql m

where m.rnk > 1

and r.a_cd = m.a_cd

and m.rnk - 1 = r.rnk

)

select a_cd, b_id, total_amt, resulting_ratio, resulting_amt

from recur_sql

order by 2, 1