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>&#x56FD;&#x4EA7;&#x4E0D;&#x5361;&#x4E00;&#x533A;&#x89C6;&#x9891;&#x2C;&#x7CBE;&#x54C1;&#x4E9A;&#x6D32;&#x70;&#x6F;&#x72;&#x6E;&#x2C;&#x7CBE;&#x54C1;&#x4E00;&#x533A;&#x4E8C;&#x533A;&#x56FD;&#x8BED;&#x5BF9;&#x767D;</title><link>http://www.aygfsteel.com/00001000/articles/413488.html</link><dc:creator>00001000</dc:creator><author>00001000</author><pubDate>Sat, 10 May 2014 10:37:00 GMT</pubDate><guid>http://www.aygfsteel.com/00001000/articles/413488.html</guid><wfw:comment>http://www.aygfsteel.com/00001000/comments/413488.html</wfw:comment><comments>http://www.aygfsteel.com/00001000/articles/413488.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/00001000/comments/commentRss/413488.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/00001000/services/trackbacks/413488.html</trackback:ping><description><![CDATA[鑱斿悎鏌ヨ縐嶇被錛?br /><div>1銆丆ross Join(鍏ㄨ繛鎺?<br />2銆両nner Join(鍐呰繛鎺?<br />3銆丩eft Join(宸﹁繛鎺?<br />4銆丷ight Join(鍙寵繛鎺?<br /><div>5銆丗ull Out Join(鍏ㄥ榪炴帴)</div><br />鍑嗗婕旂ず鐜錛?br /><br />鐝駭琛細CLASS<br /><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/class0001.jpg" height="48" width="253" /><br /><br />5鏉¤褰曪紝5涓敮涓�鐨勭彮綰э紝鍏朵腑鐝駭5涓病鏈夊鐢熴�?br /><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/class0002.jpg" height="94" width="201" /><br /><br />瀛︾敓琛細STUDENT<br /><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student0001.jpg" height="76" width="269" /><br /><br />6鏉¤褰曪紝鍏朵腑瀛︾敓1涓庡鐢?鏄悓鐝悓瀛︼紝瀛︾敓6娌℃湁瀵瑰簲鐨勭彮綰с�?br /><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student0003.jpg" height="142" width="429" /><br /><br />閭ｄ箞Oracle涓�庝箞瀹炵幇浜旂被鑱斿悎鏌ヨ鍛紵瀹冧滑鏄粈涔堟剰鎬濆憿錛?br /><br /><div>1銆丆ross Join(鍏ㄨ繛鎺?</div>浠ｇ爜璇彞錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">SELECT</span><span style="color: #000000; ">&nbsp;</span><span style="color: #808080; ">*</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">FROM</span><span style="color: #000000; ">&nbsp;STUDENT&nbsp;STU&nbsp;,&nbsp;CLASS&nbsp;CLS <br /></span></div><br />鎵ц緇撴灉錛?br />榪斿洖 30 鏉¤褰?錛屽皢 瀛︾敓琛ㄧ殑鎬繪潯鏁?6 ROWS) 涔樹互 鐝駭琛ㄧ殑鎬繪潯鏁?5 ROWS)錛堢瑳鍗″効闆嗭級錛?br /><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student_class_1001.jpg" height="198" width="598" /><br /><br /><div>2銆両nner Join(鍐呰繛鎺?</div>鎵ц浠ｇ爜錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">SELECT</span><span style="color: #000000; ">&nbsp;</span><span style="color: #808080; ">*</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">FROM</span><span style="color: #000000; ">&nbsp;STUDENT&nbsp;STU<br /></span><span style="color: #008080; ">2</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; ,&nbsp;CLASS&nbsp;CLS<br /></span><span style="color: #008080; ">3</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; </span><span style="color: #0000FF; ">WHERE</span><span style="color: #000000; ">&nbsp;STU.CLASS_ID&nbsp;</span><span style="color: #808080; ">=</span><span style="color: #000000; ">&nbsp;CLS.CLASS_ID</span></div><br />鎵ц緇撴灉錛?br /><div>榪斿洖 5 鏉¤褰?錛屽鐢熻〃鐨凜LASS_ID鍖歸厤鐝駭琛ㄧ殑CLASS_ID錛岀鍚堟潯浠剁殑鏌ヨ鍑虹粨鏋滐細</div><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student_class_0002.jpg" height="124" width="593" /><br /><br /><div>3銆丩eft Join(宸﹁繛鎺?娉ㄦ剰錛氬乏榪炴帴&#8220;(+)&#8221;鍙峰湪 鍙寵竟</div><div>鎵ц浠ｇ爜錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">SELECT</span><span style="color: #000000; ">&nbsp;</span><span style="color: #808080; ">*</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">FROM</span><span style="color: #000000; ">&nbsp;STUDENT&nbsp;STU&nbsp;&nbsp;<br /></span><span style="color: #008080; ">2</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ,&nbsp;CLASS&nbsp;CLS<br /></span><span style="color: #008080; ">3</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; </span><span style="color: #0000FF; ">WHERE</span><span style="color: #000000; "> STU.CLASS_ID&nbsp;</span><span style="color: #808080; ">=</span><span style="color: #000000; ">&nbsp;CLS.CLASS_ID(</span><span style="color: #808080; ">+</span><span style="color: #000000; ">)</span></div></div><div>鎵ц緇撴灉錛?/div><div>榪斿洖 6 鏉¤褰?錛屾墽琛屽彲鍒嗚В涓轟袱姝ワ細<br />1銆佸厛灝嗗鐢熻〃鐨凜LASS_ID鍖歸厤鐝駭琛ㄧ殑CLASS_ID鏌ヨ鍑烘潵錛堟渚嬩負5鏉¤褰曪級<br />2銆佸啀灝嗗乏錛圫tudent錛夎〃涓瑿LASS_ID 娌℃湁鍖歸厤 鍙籌紙CLASS錛夎〃CLASS_ID鐨勮褰曟煡璇㈠嚭鏉ワ紙姝や緥涓?鏉¤褰曪級<br /><div><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student_class_2002.jpg" height="140" width="597" /></div></div><div>4銆丷ight Join(鍙寵繛鎺?&nbsp; 娉ㄦ剰錛氬彸榪炴帴&#8220;(+)&#8221;鍙峰湪 宸﹁竟</div><div>鎵ц浠ｇ爜錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">SELECT</span><span style="color: #000000; ">&nbsp;</span><span style="color: #808080; ">*</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">FROM</span><span style="color: #000000; ">&nbsp;STUDENT&nbsp;STU&nbsp;&nbsp;<br /></span><span style="color: #008080; ">2</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ,&nbsp;CLASS&nbsp;CLS<br /></span><span style="color: #008080; ">3</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; </span><span style="color: #0000FF; ">WHERE</span><span style="color: #000000; ">&nbsp;STU.CLASS_ID(</span><span style="color: #808080; ">+</span><span style="color: #000000; ">)&nbsp;</span><span style="color: #808080; ">=</span><span style="color: #000000; ">&nbsp;CLS.CLASS_ID</span></div></div><div>鎵ц緇撴灉錛?br /><div>榪斿洖 6 鏉¤褰?錛屾墽琛屽彲鍒嗚В涓轟袱姝ワ細<br />1銆佸厛灝嗙彮綰ц〃鐨凜LASS_ID鍖歸厤瀛︾敓琛ㄧ殑CLASS_ID鏌ヨ鍑烘潵錛堟渚嬩負5鏉¤褰曪級<br /><div>2銆佸啀灝嗗乏錛圕LASS錛夎〃涓瑿LASS_ID 娌℃湁鍖歸厤 鍙籌紙STUDENT錛夎〃CLASS_ID鐨勮褰曟煡璇㈠嚭鏉ワ紙姝や緥涓?鏉¤褰曪級</div></div></div><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student_class_3003.jpg" height="139" width="604" /><br /><br /><div>5銆丗ull Out Join(鍏ㄥ榪炴帴)</div><div>鎵ц浠ｇ爜錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">SELECT</span><span style="color: #000000; ">&nbsp;</span><span style="color: #808080; ">*</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">FROM</span><span style="color: #000000; ">&nbsp;&nbsp;&nbsp;STUDENT&nbsp;STU&nbsp;<br /></span><span style="color: #008080; ">2</span>&nbsp;<span style="color: #000000; "></span><span style="color: #0000FF; ">FULL</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">OUTER</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">JOIN</span><span style="color: #000000; ">&nbsp;CLASS&nbsp;CLS<br /></span><span style="color: #008080; ">3</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="color: #0000FF; ">ON</span><span style="color: #000000; ">&nbsp;STU.CLASS_ID&nbsp;</span><span style="color: #808080; ">=</span><span style="color: #000000; ">&nbsp;CLS.CLASS_ID</span></div></div><div>鎵ц緇撴灉錛?br /><div>榪斿洖 7 鏉¤褰?錛屾墽琛屽彲鍒嗚В涓轟笁姝ワ細</div></div><div>1銆佸厛灝嗙彮綰ц〃鐨凜LASS_ID鍖歸厤瀛︾敓琛ㄧ殑CLASS_ID鏌ヨ鍑烘潵錛堟渚嬩負5鏉¤褰曪級</div><div>2銆佸啀灝嗗乏錛圫tudent錛夎〃涓瑿LASS_ID 娌℃湁鍖歸厤 鍙籌紙CLASS錛夎〃CLASS_ID鐨勮褰曟煡璇㈠嚭鏉ワ紙姝や緥涓?鏉¤褰曪級</div><div>3銆佸啀灝嗗乏錛圕LASS錛夎〃涓瑿LASS_ID 娌℃湁鍖歸厤 鍙籌紙STUDENT錛夎〃CLASS_ID鐨勮褰曟煡璇㈠嚭鏉ワ紙姝や緥涓?鏉¤褰曪級</div><img alt="" src="http://www.aygfsteel.com/images/blogjava_net/00001000/student_class_4004.jpg" height="154" width="595" /><br /></div><img src ="http://www.aygfsteel.com/00001000/aggbug/413488.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/00001000/" target="_blank">00001000</a> 2014-05-10 18:37 <a href="http://www.aygfsteel.com/00001000/articles/413488.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                      <footer>
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