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ԴSQLֽ
SQLֽΪִͼCREATETABLEdgclientdata(idNUMBER(7)CONSTRAINTtable_id_nnNOTNULL,date_timeVARCHAR2(40),client_macVARCHAR2(15),adver_idVARCHAR2(15),CONSTRAINTtable_pkPRIMARYKEY(date_...
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j2ee˳ȼһwebУҪΪֱΪListener/Filter/Servletͼ£ͬʱһýڵ㣺context-paramServletContextṩֵԣӦóϢǵlistener,filterڳʼʱõЩеϢ˳ͼ١Serv...
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дһCronExpressionҪ8뿪ʼ17ÿСʱִһ
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java аθ߷Ӧٶ
java߷Ӧٶȴȷñ1000ϢҪ棬1000ϢһDZÿһҪʱģѭ1000Ҫĺܶʱ䣬ҲûҪ߷Ӧٶȡ϶ҪϢIJʵ첽鿴ϵһЩϢòƿasynServiceʵ첽ʹö̡߳Ҳ֪첽Ͷ̵߳ԭʲôʹôٶô죬ҵ...
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hibernate ϵϵѯ HQL ѯ
hibernateѯHQLѯ䣿ѯAIDNAMEѯBֶβѯCsalaryͨIDAIDBIDʱCIDʱĴдһHQL䣿Ҽ㲻ĵطָ㡣еֶʱhbm.xmlʱҶʱӦôעֱAIDmany-to-one...
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java ee requestgetAttributegetParameter
javaeerequestgetAttributegetParameter1.getAttributeȡjspsetAttributeOattribute2.parameterõstringattributeõobject3.request.getParameter()ݵݣWebͻ˴WebˣHTTPݣrequest.s...
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eclipse .propertiesļ
eclipse༭.propertiesļeclipse.propertiesİװeclipsemyeclipsefeaturespropertiessearchpluginsԴļ.propertiesļdzڹʻeclipseĬϵ.propertiesļ༭м⣺ͬ2eclipse.propertiesļIJԷ...
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SQLѯй
SQLѯҪSQLϳһSQLɾSQLcode--һselectciidfromcommunityinforasCommunitywhereparent!=0andparentnotin(selectciidfromcommunityinfor)--ڶselectciidfromcommunityinforwhereparentin(select...
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һdzսĸ䣬дsqlôô
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ݲȫ
ݲȫҪʱڣ2012-01-012012-01-04ÿaaabbbcccݣÿ3Ҫѯtable1ȫtable2ʹûҲҪȫֵΪNULLлл[table1]namedatevalue-----------------------------------aaa2012-01-011bbb2012-01-011aaa201...
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sql ƶƽ취
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µй
µgzyearchar(4)--4λ20071997gzmonthchar(2)--·712θݴӱȡgzmonthֵ+1-1?ȡgzyear,gzmonthֵΪ2007,8ôgzmonth+18+1=9,gzyearΪ2007ȡgzyear,gzmonthֵΪ2007,12ôgzmonth+112+1=1,gzyearΪ2...
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