锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#20813;&#36153;&#19968;&#21306;&#44;&#20122;&#27954;&#31934;&#21697;&#25104;&#20154;&#26080;&#38480;&#30475;&#44;&#40644;&#33394;&#19968;&#21306;&#20108;&#21306;&#22312;&#32447;</title><link>http://www.aygfsteel.com/rox/category/14726.html</link><description /><language>zh-cn</language><lastBuildDate>Wed, 28 Feb 2007 06:49:05 GMT</lastBuildDate><pubDate>Wed, 28 Feb 2007 06:49:05 GMT</pubDate><ttl>60</ttl><item><title>mysql 5.X 榪佺Щlinux涓婏紝琛ㄥ悕澶у皬鍐欐晱鎰熼棶棰橈紒</title><link>http://www.aygfsteel.com/rox/archive/2007/01/29/96432.html</link><dc:creator>rox</dc:creator><author>rox</author><pubDate>Mon, 29 Jan 2007 01:40:00 GMT</pubDate><guid>http://www.aygfsteel.com/rox/archive/2007/01/29/96432.html</guid><wfw:comment>http://www.aygfsteel.com/rox/comments/96432.html</wfw:comment><comments>http://www.aygfsteel.com/rox/archive/2007/01/29/96432.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/rox/comments/commentRss/96432.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/rox/services/trackbacks/96432.html</trackback:ping><description><![CDATA[mysql鏁版嵁搴擄紝搴撳悕浠ョ洰褰曞悕瀛樺湪錛岃〃鍚嶄互鏂囦歡鍚?鍚庣紑涓?frm.MYD.MYI)瀛樺湪銆?br /><br />濡倀est搴撲笅user琛紝鍦╳indows涓?mysql_home%\data\test\user.frm錛寃indows鏂囦歡鍚嶅ぇ灝忓啓涓嶆晱鎰燂紝<br />鏃犺鏄?select * from test.user 榪樻槸 select * from test.USER錛岄兘鏄病鏈夐棶棰樼殑銆?br /><br />鑰屽湪linux涓?var/lib/mysql/test/user.frm錛?br />濡傛灉鏄?select * from test.user 灝卞繀欏誨瓨鍦?user.frm<br />濡傛灉鏄?select * from test.USER 灝卞繀欏誨瓨鍦?USER.frm<br />榪欐槸涓や釜涓嶅悓鐨勬枃浠訛紝涔熸槸涓や釜涓嶅悓鐨勮〃鍚嶃�?br />鍚屾牱搴撳悕鏄互鐩綍瀛樺湪錛屼篃瀛樺湪鍖哄垎澶у皬鍐欑殑闂銆?br /><br />鐩稿叧鐨勫畼鏂規枃妗?<br /><a ><br />http://dev.mysql.com/doc/refman/5.1/en/identifier-case-sensitivity.html</a><br /><br /><a >http://dev.mysql.com/doc/refman/5.1/zh/language-structure.html#name-case-sensitivity</a><img src ="http://www.aygfsteel.com/rox/aggbug/96432.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/rox/" target="_blank">rox</a> 2007-01-29 09:40 <a href="http://www.aygfsteel.com/rox/archive/2007/01/29/96432.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>MySql涓泦鍚堣繍綆楅潪甯歌瀹炵幇</title><link>http://www.aygfsteel.com/rox/archive/2006/09/01/67008.html</link><dc:creator>rox</dc:creator><author>rox</author><pubDate>Fri, 01 Sep 2006 01:29:00 GMT</pubDate><guid>http://www.aygfsteel.com/rox/archive/2006/09/01/67008.html</guid><wfw:comment>http://www.aygfsteel.com/rox/comments/67008.html</wfw:comment><comments>http://www.aygfsteel.com/rox/archive/2006/09/01/67008.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/rox/comments/commentRss/67008.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/rox/services/trackbacks/67008.html</trackback:ping><description><![CDATA[MySql鍙敮鎸乁nion(騫墮泦)闆嗗悎榪愮畻錛屽ソ鍍忎篃鏄?.0浠ュ悗鎵嶆湁鐨勶紱<br />浣嗘槸瀵逛簬浜ら泦Intersect銆佸樊闆咵xcept錛屽氨娌℃湁瀹炵幇浜嗐�?br />涓�鑸殑瑙ｅ喅鏂規鐢╥n鍜宯ot in鏉ヨВ鍐籌紝灝忛噺鏁版嵁榪樺彲浠ワ紝浣嗘暟鎹噺澶т簡鏁堢巼灝卞緢浣庝簡銆?br />鍏跺疄錛屽彲浠ヤ嬌鐢║nion鏉ュ疄鐜板彟澶栦袱縐嶇殑榪愮畻錛屽綋鐒舵槸娌℃湁鍔炴硶鐨勫姙娉曘�?br /><br />宸泦Except:<br />SELECT ID FROM (<br />SELECT DISTINCT A.AID AS ID FROM TABLE_A A<br />UNION ALL<br />SELECT DISTINCT B.BID AS ID FROM TABLE_B B<br />)TEMP GROUP BY ID HAVING COUNT(ID) = 1<br /><br />浜ら泦Intersect:<br />SELECT ID FROM (<br />SELECT DISTINCT A.AID AS ID FROM TABLE_A A<br />UNION ALL<br />SELECT DISTINCT B.BID AS ID FROM TABLE_B B<br />)TEMP GROUP BY ID HAVING COUNT(ID) = 2<br /><br />涓嶈繃錛屼笂榪版柟娉曠殑鍔熻兘涔熸湁闄愶紝<br />鍙兘鐢ㄦ潵媯�鏌ユ煇涓猧d鏄笉鏄疉銆丅琛ㄤ腑閮藉瓨鍦紝<br />鎴栬�呭彧瀛樺湪浜嶢銆丅琛ㄥ叾涓箣涓�錛?br />騫朵笉鑳藉id鍦ㄦ煇琛ㄤ腑澶氭鍑虹幇鍋氬嚭媯�鏌ャ�?br />鑰屼笖錛屽樊闆嗘槸鏈夊厛鍚庝箣鍒嗭紝榪欓噷娌℃湁銆?br /><br /><img src ="http://www.aygfsteel.com/rox/aggbug/67008.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/rox/" target="_blank">rox</a> 2006-09-01 09:29 <a href="http://www.aygfsteel.com/rox/archive/2006/09/01/67008.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                       <footer>
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