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;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#25773;&#25918;&#22312;&#32447;&#44;&#20122;&#27954;&#25104;&#97;&#20154;&#29255;&#22312;&#32447;&#35266;&#30475;&#31934;&#21697;&#44;&#119;&#119;&#119;&#46;&#20122;&#27954;&#31934;&#21697;</title><link>http://m.tkk7.com/neverend/archive/2012/02/04/369381.html</link><dc:creator>neverend</dc:creator><author>neverend</author><pubDate>Sat, 04 Feb 2012 10:33:00 GMT</pubDate><guid>http://m.tkk7.com/neverend/archive/2012/02/04/369381.html</guid><wfw:comment>http://m.tkk7.com/neverend/comments/369381.html</wfw:comment><comments>http://m.tkk7.com/neverend/archive/2012/02/04/369381.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/neverend/comments/commentRss/369381.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/neverend/services/trackbacks/369381.html</trackback:ping><description><![CDATA[MySQL鎵ц璁″垝&nbsp;<br /><br />璋冪敤鏂瑰紡錛?br />explain select ...<br /><br />explain&nbsp;extended select ...<br />show warnings 寰楀埌MySQL浼樺寲鍣ㄤ紭鍖栧悗鐨勬煡璇㈣鍙?br /><br />鎵ц璁″垝鍖呭惈鐨勪俊鎭細<br /><img border="0" alt="" src="http://m.tkk7.com/images/blogjava_net/neverend/鍥劇墖1.png" width="724" height="52" /><br /><br />璇存槑錛?br />id錛?select瀛愬彞鐨勪紭鍏堢駭錛宨d瓚婂ぇ錛屼紭鍏堢駭瓚婇珮銆?br />select_type: 鏌ヨ綾誨瀷<br />table: 鏌ヨ鐨勮〃鍚?br />type:&nbsp; MySQL鎵懼埌鎵�闇�琛屼嬌鐢ㄧ殑鏂瑰紡錛屽寘鎷涓嬬被鍨嬶細<br /><br /><img border="0" alt="" src="http://m.tkk7.com/images/blogjava_net/neverend/鍥劇墖2.png" width="512" height="53" /><br />ALL: 鎵弿鍏ㄨ〃<br />index:&nbsp;鎵弿鍏ㄩ儴绱㈠紩鏍?br />range:&nbsp;鎵弿閮ㄥ垎绱㈠紩<br />ref: 闈炲敮涓�鎬х儲寮曟壂鎻?br />eq_ref錛氬敮涓�鎬х儲寮曟壂鎻?br />const, system: <span style="font-family: 瀹嬩綋; color: black; mso-ascii-font-family: Calibri; mso-fareast-font-family: 瀹嬩綋; mso-bidi-font-family: +mn-cs; mso-color-index: 1; mso-font-kerning: 12.0pt; language: zh-CN">褰?/span><span style="font-family: Arial; color: black; mso-ascii-font-family: Arial; mso-fareast-font-family: 瀹嬩綋; mso-bidi-font-family: Arial; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US">MySQL</span><span style="font-family: 瀹嬩綋; color: black; mso-ascii-font-family: Calibri; mso-fareast-font-family: 瀹嬩綋; mso-bidi-font-family: +mn-cs; mso-color-index: 1; mso-font-kerning: 12.0pt; language: zh-CN">瀵規(guī)煡璇㈡煇閮ㄥ垎榪涜浼樺寲錛屽茍杞崲涓轟竴涓父閲忔椂錛屼嬌鐢ㄨ繖浜涚被鍨嬭闂?/span><br />NULL: <span style="font-family: Arial; color: black; mso-ascii-font-family: Arial; mso-fareast-font-family: 瀹嬩綋; mso-bidi-font-family: Arial; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US">MySQL</span><span style="font-family: 瀹嬩綋; color: black; mso-ascii-font-family: Calibri; mso-fareast-font-family: 瀹嬩綋; mso-bidi-font-family: +mn-cs; mso-color-index: 1; mso-font-kerning: 12.0pt; language: zh-CN">鍦ㄤ紭鍖栬繃紼嬩腑鍒嗚В璇彞錛屾墽琛屾椂鐢氳嚦涓嶇敤璁塊棶琛ㄦ垨绱㈠紩</span><br /><br />rows: 鎵懼埌鎵�闇�璁板綍闇�瑕佽鍙栫殑琛屾暟<br />Extra: 棰濆淇℃伅<br /><br />鎵ц璁″垝鍙敤鏉ュ垎鏋恠elect璇彞鐨勬�ц兘錛屾帓鏌ユ�ц兘鐡墮銆?br /><br />鍙傝�冭祫鏂欙細<br /><a >http://wenku.baidu.com/view/d4416c27aaea998fcc220ea7.html</a><br /><br /><a href="/Files/neverend/mysqlexplain-MySQL鎵ц璁″垝瑙ｈ.ppt">/Files/neverend/mysqlexplain-MySQL鎵ц璁″垝瑙ｈ.ppt</a> <img src ="http://m.tkk7.com/neverend/aggbug/369381.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/neverend/" target="_blank">neverend</a> 2012-02-04 18:33 <a href="http://m.tkk7.com/neverend/archive/2012/02/04/369381.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>MySQL姝婚攣</title><link>http://m.tkk7.com/neverend/archive/2012/02/01/369197.html</link><dc:creator>neverend</dc:creator><author>neverend</author><pubDate>Wed, 01 Feb 2012 14:37:00 GMT</pubDate><guid>http://m.tkk7.com/neverend/archive/2012/02/01/369197.html</guid><wfw:comment>http://m.tkk7.com/neverend/comments/369197.html</wfw:comment><comments>http://m.tkk7.com/neverend/archive/2012/02/01/369197.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/neverend/comments/commentRss/369197.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/neverend/services/trackbacks/369197.html</trackback:ping><description><![CDATA[璁ㄨMySQL姝婚攣闂 <br /><br />姝婚攣鍒嗘瀽<br /><img src ="http://m.tkk7.com/neverend/aggbug/369197.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/neverend/" target="_blank">neverend</a> 2012-02-01 22:37 <a href="http://m.tkk7.com/neverend/archive/2012/02/01/369197.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                  <footer>
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