Sql 如何获得每个ID的正数和负数计数？

我想得到每个id的负值和正值的计数

ID=1有2个正事务和0个负事务。等等。

 with trans_detail as 
 (
 select 1 as trans_id, 100 as trans_amount  from dual union all
 select 1 as trans_id, 200 as trans_amount  from dual union all
 select 2 as trans_id, -100 as trans_amount  from dual union all
 select 2 as trans_id, -300 as trans_amount  from dual union all
 select 3 as trans_id, 400 as trans_amount   from dual union all
 select 3 as trans_id, -500 as trans_amount  from dual
 )

 select trans_id,
       count(*) over (partition by trans_id) as pos_count,
       count(*) over (partition by trans_id) as neg_count        
from trans_detail
where trans_amount > 0
UNION
select trans_id,
       count(*) over (partition by trans_id) as pos_count,
       count(*) over (partition by trans_id) as neg_count        
from trans_detail
where trans_amount < 0;

选择trans\u id，
nvl（总和（当交易金额小于0时，则为1结束），0）为负，
nvl（金额（当交易金额大于0时，则为1结束），0）作为pos
从trans_细节
按trans_id分组

---

SQL Fiddle:

每次看到一个正的或负的金额时，都要计算1，并将其相加

select trans_id,
sum(case when trans_amount >=0 then 1 else 0 end) as pos_amt,
sum(case when trans_amount < 0 then 1 else 0 end) as neg_amt
from trans_detail
group by trans_id

选择trans\u id，
金额（如果交易金额>=0，则为1，否则为0结束）作为pos金额，
作为负金额的总和（当交易金额小于0时，则为1，否则为0结束）
从trans_细节
按trans_id分组

---

您可以使用条件计数：

with trans_detail as 
 (
 select 1 as trans_id, 100 as trans_amount  from dual union all
 select 1 as trans_id, 200 as trans_amount  from dual union all
 select 2 as trans_id, -100 as trans_amount  from dual union all
 select 2 as trans_id, -300 as trans_amount  from dual union all
 select 3 as trans_id, 400 as trans_amount   from dual union all
 select 3 as trans_id, -500 as trans_amount  from dual
 )
select trans_id,
       count(case when trans_amount >= 0 then trans_id end) as pos_count,
       count(case when trans_amount < 0 then trans_id end) as neg_count        
from trans_detail
group by trans_id
order by trans_id;

  TRANS_ID  POS_COUNT  NEG_COUNT
---------- ---------- ----------
         1          2          0
         2          0          2
         3          1          1

)；这会忽略零，但如果愿意，您可以将其包含在任一解码中。

试试这个

select trans_id,
       Sum(case when trans_amount>=0 then 1 else 0 end) as pos_count,
       Sum(case when trans_amount<0 then 1 else 0 end) as neg_count,
from trans_detail
group by trans_id

选择trans\u id，
合计（当交易金额>=0时，则为1，否则为0结束）作为pos_计数，
金额（交易金额时的情况）
with trans_detail as 
 (
 select 1 as trans_id, 100 as trans_amount  from dual union all
 select 1 as trans_id, 200 as trans_amount  from dual union all
 select 2 as trans_id, -100 as trans_amount  from dual union all
 select 2 as trans_id, -300 as trans_amount  from dual union all
 select 3 as trans_id, 400 as trans_amount   from dual union all
 select 3 as trans_id, -500 as trans_amount  from dual
 )
select trans_id,
       count(case when trans_amount >= 0 then trans_id end) as pos_count,
       count(case when trans_amount < 0 then trans_id end) as neg_count        
from trans_detail
group by trans_id
order by trans_id;

  TRANS_ID  POS_COUNT  NEG_COUNT
---------- ---------- ----------
         1          2          0
         2          0          2
         3          1          1

select trans_id,
       count(decode(sign(trans_amount), 1, trans_id)) as pos_count,
       count(decode(sign(trans_amount), -1, trans_id)) as neg_count        
from trans_detail
group by trans_id
order by trans_id;

select trans_id,
       Sum(case when trans_amount>=0 then 1 else 0 end) as pos_count,
       Sum(case when trans_amount<0 then 1 else 0 end) as neg_count,
from trans_detail
group by trans_id