Oracle 删除重复记录的方法

核心提示：使用分析函数rownumber() over( partition by ... order by ...)下面是一个例子。DELETE FROM Portfolio_Prod_Summ_Ytd_MvWHERE ROWID IN (SELECT Rowind FROM (SELECT ROWID Rowind, Row

使用分析函数rownumber() over( partition by ... order by ...)

下面是一个例子。

　　DELETE FROM Portfolio_Prod_Summ_Ytd_Mv
WHERE ROWID IN (SELECT Rowind
　　　　　 FROM (SELECT ROWID Rowind,
　　　　　　　　 Row_Number() Over(PARTITION BY Gmis_Prod_Code_Ref, Service_Type_Ref, Booking_Center, Client_Advisor_Gpn, As_On_Date, Client_Asst_Chf, Liabilities_Chf, Revenue_Chf, Ytd_Revenue_Chf, Client_Asst_Usd, Liabilities_Usd, Revenue_Usd, Ytd_Revenue_Usd, Client_Asst_Booking_Center, Liabilities_Booking_Center, Revenue_Booking_Center, Ytd_Revenue_Booking_Center, Dmm_Csk_Id, Ca_Name, Desk_Name, Desk_Fis_Id, Ct_Name, Ct_Fis_Id, Bs_Name, Bs_Fis_Id, Service_Type_Ref_Org, Product_Code_Type_Ref, Aum_Usd, Aum_Booking_Center, Aum_Chf, Hri_Gpn, Desk_Cccode, Ct_Cccode, Bs_Cccode, Bu_Cccode, Bu_Name, Ba_Cccode, Ba_Name ORDER BY Gmis_Prod_Code_Ref) Rownumber
　　　　　　　 FROM Portfolio_Prod_Summ_Ytd_Mv)
　　　　 WHERE Rownumber > 1)