删除SQL中的部分重复？

结果表（CSV）看起来是这样的：删除SQL中的部分重复？

 
NAME    ,TITLE     ,YEAR ,QNTY ,CLUB   ,PRICE ,LOWEST_CLUB ,LOWEST 
Andy Aardverk  ,Avarice is Good   ,1998,1,Basic   ,218.95, CARP   ,215.95 
Andy Aardverk  ,Avarice is Good   ,1998,1,Basic   ,218.95, YRB Bronze  ,215.95 
Andy Aardverk  ,Yon-juu Hachi   ,1948,1,Basic   ,44.95, CARP   ,41.95 
Boswell Biddles  ,Not That London!   ,2003,1,Basic   ,12.5, CAA   ,10 
Boswell Biddles  ,Not That London!   ,2003,1,Basic   ,12.5, Readers Digest ,10 
Cary Cizek   ,Ringo to Nashi   ,1997,1,Basic   ,32.95, YRB Gold  ,29.95 
Cary Cizek   ,Ringo to Nashi   ,1997,1,Basic   ,32.95, York Club  ,29.95 
Cary Cizek   ,Toronto Underground  ,2001,1,YRB Gold  ,14.45, York Club  ,12.95 
Egbert Engles  ,Capricia's Conundrum  ,1993,1,CARP   ,13.45, Guelph Club ,12.95 
Egbert Engles  ,Tande mou nai   ,2002,1,Basic   ,112.95, Oprah   ,104.95 
Egbert Engles  ,Tande mou nai   ,2002,1,Basic   ,112.95, YRB Silver  ,104.95 
Ekksdwl Qjksynn  ,I don't think so   ,2001,1,YRB Gold  ,12.5, CAA   ,11.5 
George Wolf   ,Math is fun!    ,1995,1,YRB Silver  ,13.5, CAA   ,12 
Jack Daniels  ,Eigen Eigen    ,1980,1,York Club  ,57.95, Oprah   ,56.95 
Jack Daniels  ,Okay Why Not?   ,2001,1,York Club  ,18.45, Oprah   ,17.45 
Jackie Johassen  ,Getting into Snork U. ,2004,1,YRB Silver  ,21.95, Waterloo Club ,20.45 
Jackie Johassen  ,Not That London!   ,2003,1,Basic   ,12.5, CAA   ,10 
Klive Kittlehart ,Will Snoopy find Lucy? ,1990,1,YRB Bronze  ,14.95, YRB Gold  ,12.95 
Lux Luthor   ,Is Math is fun?   ,1996,1,Basic   ,72.95, Oprah   ,69.95 
Lux Luthor   ,Tropical Windsor   ,2004,1,Basic   ,18.95, Oprah   ,17.95 
Nigel Nerd   ,Are my feet too big?  ,1993,1,Basic   ,13.95, CAA   ,11.45 
Nigel Nerd   ,Dogs are not Cats  ,1995,1,Basic   ,35.95, UofT Club  ,32.95 
Phil Regis   ,Databases made Real Hard ,2002,1,Basic   ,39.95, Oprah   ,35.95 
Pretence Parker  ,Tchuss     ,2002,1,Basic   ,24.95, Guelph Club ,21.95 
Qfwfq    ,The Earth is not Enough ,2003,1,YRB Gold  ,37.37, Oprah   ,36.37 
Qfwfq    ,Under Your Bed   ,2004,1,Oprah   ,14.85, CAA   ,13.85 
Suzy Sedwick  ,Are my feet too big?  ,1993,1,YRB Silver  ,12.95, Oprah   ,11.45 
Tracy Turnip  ,Will Snoopy find Lucy? ,1990,1,Basic   ,15.95, Readers Digest ,13.95 
Tracy Turnip  ,Will Snoopy find Lucy? ,1990,1,Basic   ,15.95, YRB Silver  ,13.95 
Tracy Turnip  ,Yon-juu Hachi   ,1948,1,Readers Digest ,41, York Club  ,40.95 
Valerie Vixen  ,Base de Donne   ,2003,1,YRB Bronze  ,23.95, Readers Digest ,20.95 
Xia Xu    ,Where art thou Bertha? ,2003,1,Basic   ,30.95, CAA   ,26.95 
Yves Yonge   ,Radiator Barbecuing  ,2002,2,Basic   ,14.2, Waterloo Club ,12.2 
Zebulon Zilio  ,Transmorgifacation  ,2004,1,Basic   ,288.73, CAA   ,278.73 
    34 record(s) selected.,,,,,,,

我希望能够只显示最低的选项之一。例如'Andy Aardverk'购买'Avarice is Good'并且可以以较低的价格从'CARP'或'YRB Bronze'购买。我只想要一个人展示它，因为它可能是'鲤鱼'或'YRB青铜'，但不是两者。

我尝试“按组”上使用的姓名，名称，年份，qnty，俱乐部，价格'，但被赋予此错误：

'SQL0119N An expression starting with "LOWEST_CLUB" specified in a SELECT 
clause, HAVING clause, or ORDER BY clause is not specified in the GROUP BY 
clause or it is in a SELECT clause, HAVING clause, or ORDER BY clause with a 
column function and no GROUP BY clause is specified. SQLSTATE=42803'

来源

2014-04-05 Umer Z

这本来是与你的实际的查询更容易，但无论如何，我会放弃它。您可以通过使用CTE这样解决这个问题：

;WITH CTE AS (
    SELECT 
     ROW_NUMBER() OVER(PARTITION BY [NAME], [TITLE] ORDER BY LOWEST_CLUB ASC, some_fallback_if_two_prices_are_the_same ASC) AS RowNumber, 
     [NAME], 
     [TITLE], 
     col1, 
     col2, 
     lowest_price, 
     some_fallback_if_two_prices_are_the_same 
    FROM [Table] 
) 
SELECT * --or rewrite your columns if you want to avoid the RowNumber 
FROM CTE 
WHERE RowNumber = 1;

这SELECT的CTE里面应该是你当前的查询+的ROW_NUMBER()线。鉴于我没有查询，我无法给你最终结果。你将不得不摆弄它，直到它适合你。

来源

2014-04-06 00:29:44 Trafz

删除SQL中的部分重复？

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