SQL刪除某列中的重複項

Question

大家下午好！

有一個關於刪除一列中的重複項並刪除整行的問題。我將在Excel中的屏幕截圖中提供一個示例，以便不提供專有信息。

我期待去除黃色例如行的一個突出但不希望將其限制在一個Dr.Mike或例如一個健康夥伴診所。相對較新，所以任何幫助將不勝感激。

謝謝

Answer 1

我用下面的腳本來刪除重複。

SELECT Prov, Clinic,Address, count(*) 
    FROM SomeTable 
    group by Prov, Clinic,Address 
    having count(*)>1 



    SELECT Prov, Clinic,Address, countrows = count(*) 
INTO [holdkey] 
FROM SomeTable 
GROUP BY Prov, Clinic,Address 
HAVING count(*) > 1 



    SELECT DISTINCT sometable.* 
INTO holdingtable 
FROM sometable, holdkey 
WHERE sometable.Prov = holdkey.Prov 
AND sometable.Clinic = holdkey.Clinic 
AND sometable.Address = holdkey.Address 

SELECT Prov, Clinic,Address, count(*) 
    FROM holdingtable 
    group by Prov, Clinic,Address 
    having count(*)>1 

DELETE sometable 
FROM sometable, holdkey 
WHERE sometable.Prov = holdkey.Prov 
AND sometable.Clinic = holdkey.Clinic 
AND sometable.Address = holdkey.Address 

INSERT sometable SELECT * FROM holdingtable 

Answer 2

你可以這樣做：

select distinct prov, clinic, address 
from t;