MSSQL DISTINCT再次

Question

此查詢工作完全在MySQL，但我應該重寫與MSSQL工作，這是行不通

SELECT DISTINCT TOP 20 [UF].[id], [UF].[created], [Company].[name] 
FROM [user_functions] AS [UF] 
LEFT JOIN [companies] AS [Company] ON ([Company].[code] = [UF].[company_code]) 
WHERE [UF].[user_id] = 8923 AND [UF].[state] != 500 
ORDER BY [UF].[created] DESC 

該查詢返回重複的行，即使我設置DISTINCT。

但是，當從SELECT刪除[Company].[name]它是正確返回。
我想使用[Company]和[UF]表中的很多字段。

Answer 1

你可以嘗試ROW_NUMBER，並得到如下的第一ROWNUM：

select * from 
(
    SELECT DISTINCT TOP 20 [UF].[id], [UF].[created], [Company].[name], 
    RowNum = row_number() over(partition by [Company].[name] order by [UF].[ID]) 
    FROM [user_functions] AS [UF] 
    LEFT JOIN [companies] AS [Company] ON ([Company].[code] = [UF].[company_code]) 
    WHERE [UF].[user_id] = 8923 AND [UF].[state] != 500 
) a where RowNum = 1 
order by a.Created Desc