[英]RANKing in group by in oracle
I have a query我有一个查询
Select age,qualification,sum(income) as total_income from employee
group by age,qualification;
I want to find rank on based total_income for the group of age and qualification.我想根据年龄和资格组的 total_income 找到排名。
For example例如
19|Grad|5000|rank:1
19|Grad|4000|rank:2
19|Grad|3000|rank:3
26|Grad|6000|rank:1
26|Grad|5000|rank:2
26|PosG|8000|rank:1
26|PosG|6000|rank:2
Can I do it in Oracle?我可以在 Oracle 中执行此操作吗? I tried with partition by but not able to figure it out.我尝试使用 partition by 但无法弄清楚。
Oracle 11g R2 Schema Setup : Oracle 11g R2 架构设置:
CREATE TABLE Employees ( Age, Qualification, Income ) AS
SELECT 19, 'Grad', 5000 FROM DUAL
UNION ALL SELECT 19, 'Grad', 4000 FROM DUAL
UNION ALL SELECT 19, 'Grad', 3000 FROM DUAL
UNION ALL SELECT 26, 'Grad', 6000 FROM DUAL
UNION ALL SELECT 26, 'Grad', 5000 FROM DUAL
UNION ALL SELECT 26, 'PosG', 8000 FROM DUAL
UNION ALL SELECT 26, 'PosG', 6000 FROM DUAL;
Query 1 :查询 1 :
SELECT Age,
Qualification,
Income,
RANK() OVER ( PARTITION BY Age, Qualification ORDER BY Income DESC ) AS "Rank"
FROM Employees
| AGE | QUALIFICATION | INCOME | Rank |
|-----|---------------|--------|------|
| 19 | Grad | 5000 | 1 |
| 19 | Grad | 4000 | 2 |
| 19 | Grad | 3000 | 3 |
| 26 | Grad | 6000 | 1 |
| 26 | Grad | 5000 | 2 |
| 26 | PosG | 8000 | 1 |
| 26 | PosG | 6000 | 2 |
Query 2 :查询 2 :
WITH total_incomes AS (
SELECT Age,
Qualification,
SUM( Income ) AS total_income
FROM Employees
GROUP BY
Age,
Qualification
)
SELECT Age,
Qualification,
total_income,
RANK() OVER ( ORDER BY total_income DESC ) AS "Rank"
FROM total_incomes
| AGE | QUALIFICATION | TOTAL_INCOME | Rank |
|-----|---------------|--------------|------|
| 26 | PosG | 14000 | 1 |
| 19 | Grad | 12000 | 2 |
| 26 | Grad | 11000 | 3 |
select age,qualification,total_income
row_number() over (partition by age,qualification order by income desc) as rank from
(
Select age,qualification,sum(income) as total_income from employee
group by age,qualification
) T1
Select
Age,
Qualification,
sum(income) as totalIncome,
dense_rank () over (order by
sum(income) desc) as DRnk from exam_RG
group by age,Qualification
Age Qualification totalIncome DRnk
26 Grad 21000 1
19 Grad 12000 2
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