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欧洲足联2020年 :ʽAccessÿ3犵

2020ŷޱԤ www.okrxb.com rg:2019-10-24 10:44:28
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  һʽ1NF
      ^һʽ1NFָPϵģӵһҎҪе򶼑ԓԭԵÿһжDzɷָԭӔǼMӛ䛵ȷԭӔwеijжֵr횲֞鲻ͬČڷϵһʽ1NFеÿֵֻnjwһԻһԵһ֮һʽǟo؏͵

  ڶʽ2NF
      1NFĻAǴaԱȫهںxa1NFAԌaIJֺه
      ڶʽ2NFڵһʽ1NFĻAϽMڶʽ2NFȝMһʽ1NFڶʽ2NFҪ󔵓еÿӛ䛱횿ԱΨһ؅^xȡһ܅^ÿwČԻԽM錍wΨһR
      ڶʽ2NFҪwČȫهPI^ȫهָܴڃHهPIһֵČ

  ʽ3NF
      2NFAκηԲهԣ2NFAfه
      ʽ3NFǵڶʽ2NFһӼMʽ3NF횝Mڶʽ2NF֮ʽ3NFҪһPϵвPϵѰķPIϢһTϢÿTвT̖dept_idTQTϢôچTϢгT̖ͲٌTQTcTPϢټTϢ



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