Oracle - 根據列值進行篩選

我有以下表格，我希望根據不同類型的編號獲得結果，每CONTRACT_ID可用。Oracle - 根據列值進行篩選

表：

______________________________________________________________________________________ 
|Source    | CONTRACT_ID | TYPE  | ADDRESS | PHONE   | 
______________________________________________________________________________________ 
|Source1   | 1234  | INSURED  | unique1 | 4321   | 
______________________________________________________________________________________ 
|Source1   | 1234  | INSURED  | unique1 | 4321   | 
______________________________________________________________________________________ 
|Source1   | 1234  | DRIVER  | unique1 | 4321   | 
______________________________________________________________________________________ 
|Source1   | 1234  | INSURED  | unique1 | 4321   | 
______________________________________________________________________________________ 
|Source2   | 2345  | INSURED  | unique2 | 5678   | 
______________________________________________________________________________________ 
|Source2   | 2345  | DRIVER  | unique2 | 5678   | 
______________________________________________________________________________________ 
|Source2   | 2345  | CONTRACT | unique2 | 5678   | 
______________________________________________________________________________________

結果：

______________________________________________________________________________________ 
|Source    | CONTRACT_ID | ROLES  | ADDRESS | PHONE   | 
______________________________________________________________________________________ 
|Source1   | 1234  | 2   | unique1 | 4321   | 
______________________________________________________________________________________ 
|Source2   | 2345  | 3   | unique2 | 5678   | 
______________________________________________________________________________________

即在結果表中的ROLES列應爲不同TYPE S的一個獨特的數CONTRACT_ID。

任何人都可以幫忙嗎？

來源

2017-09-25 Nidheesh

你到目前爲止嘗試過什麼？ –

我已經衝浪，但仍然無法得到如何計算不同的varchar值@KaushikNayak的數量！ – Nidheesh

我認爲你正在尋找count(distinct)：

select Source, CONTRACT_ID, ADDRESS, PHONE, count(distinct type) as roles 
from t 
group by Source, CONTRACT_ID, ADDRESS, PHONE ;

這不是「過濾」。這是「聚合」。

來源

2017-09-25 12:53:59

SELECT max(source) , contract_id , 
count(DISTINCT type) roles , max(address), max(phone) 
FROM Table group by contract_id ;

來源

2017-09-25 12:56:34

Oracle - 根據列值進行篩選

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