推荐方法3
--方法1：
SELECT *
FROM ( SELECT Row_Number() OVER ( PARTITION BY [orderno] ORDER BY ( SELECT
0
) ) AS RowNO,
*
FROM tblMulCharge
) t
WHERE T.RowNO > 1 ;
--方法2：
WITH ct01
AS ( SELECT ROW_NUMBER() OVER ( PARTITION BY orderno ORDER BY ( SELECT
0
) ) AS rn
FROM tblMulCharge
)
DELETE FROM ct01
WHERE rn > 1
go
--方法3:针对大数据
WITH ct01 AS ( SELECT [ID], [OriOrderNo], [OrderNo], [TotalAmount], [PayAmount], [ProviderAmount], [transaction_id], [PNRCode], [Consumer], [Provider], [SellerAccount], [BuyerAccount], [State], [PayTime], [PayInfo], [refundTime], [refund_id], [refund_info], [refundTimeV], [refund_id_V], [refund_info_V], [refundAmount], ROW_NUMBER() OVER ( PARTITION BY orderno ORDER BY ( SELECT 0 ) ) AS rn FROM tblMulCharge ) SELECT [ID] ,[OriOrderNo] ,[OrderNo] ,[TotalAmount] ,[PayAmount] ,[ProviderAmount] ,[transaction_id] ,[PNRCode] ,[Consumer] ,[Provider] ,[SellerAccount] ,[BuyerAccount] ,[State] ,[PayTime] ,[PayInfo] ,[refundTime] ,[refund_id] ,[refund_info] ,[refundTimeV] ,[refund_id_V] ,[refund_info_V] ,[refundAmount] INTO dbo.tblMulCharge_tmp FROM ct01 WHERE rn = 1 DROP TABLE dbo.tblMulCharge ; EXEC sp_rename 'dbo.tblMulCharge_tmp','tblMulCharge'
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