{"id":93954,"date":"2024-10-19T18:18:19","date_gmt":"2024-10-19T10:18:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93954\/"},"modified":"2024-10-19T18:18:20","modified_gmt":"2024-10-19T10:18:20","slug":"oracle-join%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93954\/","title":{"rendered":"Oracle join\u7684\u6b63\u78ba\u7528\u6cd5\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"oracle-join%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95%e6%8f%8f%e8%bf%b0-jpuYCgYALL\">Oracle Join\u7684\u6b63\u78ba\u7528\u6cd5\u63cf\u8ff0<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOracle\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u578b\u8cc7\u6599\u5eab\uff0c\u800cJoin\u64cd\u4f5c\u5247\u662f\u7528\u4f86\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u8cc7\u6599\u7684\u95dc\u9375\u6280\u8853\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle Join\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u9019\u4e00\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afjoin%ef%bc%9f-jpuYCgYALL\">\u4ec0\u9ebc\u662fJoin\uff1f<\/h2>\n<p>Join\u662f\u4e00\u7a2eSQL\u64cd\u4f5c\uff0c\u7528\u65bc\u5c07\u4f86\u81ea\u5169\u500b\u6216\u591a\u500b\u8868\u7684\u8cc7\u6599\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u9032\u884c\u7d50\u5408\u3002\u9019\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u5f9e\u4e0d\u540c\u7684\u8cc7\u6599\u8868\u4e2d\u7372\u53d6\u76f8\u95dc\u7684\u8cc7\u8a0a\u3002Oracle\u652f\u6301\u591a\u7a2eJoin\u985e\u578b\uff0c\u5305\u62ecInner Join\u3001Outer Join\u3001Cross Join\u7b49\u3002<\/p>\n<h2 id=\"join%e7%9a%84%e9%a1%9e%e5%9e%8b-jpuYCgYALL\">Join\u7684\u985e\u578b<\/h2>\n<h3 id=\"1-inner-join-jpuYCgYALL\">1. Inner Join<\/h3>\n<p>Inner Join\u662f\u6700\u5e38\u7528\u7684Join\u985e\u578b\uff0c\u5b83\u53ea\u8fd4\u56de\u5728\u5169\u500b\u8868\u4e2d\u90fd\u6709\u7684\u8cc7\u6599\u3002\u4ee5\u4e0b\u662f\u4e00\u500bInner Join\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nINNER JOIN table_b b ON a.common_column = b.common_column;<\/code><\/pre>\n<h3 id=\"2-outer-join-jpuYCgYALL\">2. Outer Join<\/h3>\n<p>Outer Join\u5206\u70ba\u4e09\u7a2e\u985e\u578b\uff1aLeft Outer Join\u3001Right Outer Join\u548cFull Outer Join\u3002\u9019\u4e9bJoin\u6703\u8fd4\u56de\u81f3\u5c11\u4e00\u500b\u8868\u4e2d\u7684\u6240\u6709\u8cc7\u6599\uff0c\u5373\u4f7f\u5728\u53e6\u4e00\u500b\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8cc7\u6599\u3002<\/p>\n<ul>\n<li><strong>Left Outer Join\uff1a<\/strong>\u8fd4\u56de\u5de6\u8868\u7684\u6240\u6709\u8cc7\u6599\u53ca\u53f3\u8868\u4e2d\u5339\u914d\u7684\u8cc7\u6599\u3002<\/li>\n<li><strong>Right Outer Join\uff1a<\/strong>\u8fd4\u56de\u53f3\u8868\u7684\u6240\u6709\u8cc7\u6599\u53ca\u5de6\u8868\u4e2d\u5339\u914d\u7684\u8cc7\u6599\u3002<\/li>\n<li><strong>Full Outer Join\uff1a<\/strong>\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7684\u6240\u6709\u8cc7\u6599\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662fLeft Outer Join\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nLEFT OUTER JOIN table_b b ON a.common_column = b.common_column;<\/code><\/pre>\n<h3 id=\"3-cross-join-jpuYCgYALL\">3. Cross Join<\/h3>\n<p>Cross Join\u6703\u8fd4\u56de\u5169\u500b\u8868\u7684\u7b1b\u5361\u723e\u7a4d\uff0c\u5373\u6bcf\u4e00\u884c\u90fd\u6703\u8207\u53e6\u4e00\u500b\u8868\u7684\u6bcf\u4e00\u884c\u9032\u884c\u7d44\u5408\u3002\u9019\u7a2eJoin\u901a\u5e38\u4e0d\u5e38\u7528\uff0c\u56e0\u70ba\u5b83\u6703\u751f\u6210\u5927\u91cf\u7684\u8cc7\u6599\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nCROSS JOIN table_b b;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8join%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-jpuYCgYALL\">\u4f7f\u7528Join\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528Join\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\uff1a<\/strong>\u904e\u591a\u7684Join\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u578b\u8cc7\u6599\u96c6\u6642\u3002\u56e0\u6b64\uff0c\u61c9\u8b39\u614e\u9078\u64c7Join\u7684\u6578\u91cf\u548c\u985e\u578b\u3002<\/li>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u70baJoin\u7684\u5217\u5efa\u7acb\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u8cc7\u6599\u5b8c\u6574\u6027\uff1a<\/strong>\u78ba\u4fddJoin\u7684\u689d\u4ef6\u6b63\u78ba\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8cc7\u6599\u91cd\u8907\u6216\u907a\u6f0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-jpuYCgYALL\">\u7d50\u8ad6<\/h2>\n<p>Oracle\u7684Join\u64cd\u4f5c\u662f\u8cc7\u6599\u5eab\u67e5\u8a62\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528Inner Join\u3001Outer Join\u548cCross Join\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u5f9e\u591a\u500b\u8cc7\u6599\u8868\u4e2d\u6aa2\u7d22\u6240\u9700\u7684\u8cc7\u8a0a\u3002\u4e86\u89e3\u6bcf\u7a2eJoin\u7684\u7279\u6027\u53ca\u5176\u9069\u7528\u5834\u666f\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u8cc7\u6599\u67e5\u8a62\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u5c08\u6848\u4e2d\u4f7f\u7528\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u63a2\u7d22\u66f4\u591a\u6709\u95dc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle join\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u638c\u63e1\u5167\u90e8\u9023\u63a5\u3001\u5916\u90e8\u9023\u63a5\u53ca\u4ea4\u53c9\u9023\u63a5\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-93954","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93954","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=93954"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93954\/revisions"}],"predecessor-version":[{"id":93955,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93954\/revisions\/93955"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}