{"id":191476,"date":"2024-11-12T16:44:20","date_gmt":"2024-11-12T08:44:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/191476\/"},"modified":"2024-11-12T16:44:21","modified_gmt":"2024-11-12T08:44:21","slug":"%e8%a9%b3%e8%a7%a3oracle%e5%a4%9a%e7%a8%ae%e8%a1%a8%e9%80%a3%e6%8e%a5%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/191476\/","title":{"rendered":"\u8a73\u89e3Oracle\u591a\u7a2e\u8868\u9023\u63a5\u65b9\u5f0f"},"content":{"rendered":"<h1 id=\"%e8%a9%b3%e8%a7%a3oracle%e5%a4%9a%e7%a8%ae%e8%a1%a8%e9%80%a3%e6%8e%a5%e6%96%b9%e5%bc%8f-FsYHRQkCNY\">\u8a73\u89e3Oracle\u591a\u7a2e\u8868\u9023\u63a5\u65b9\u5f0f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u8868\u9023\u63a5\u662f\u67e5\u8a62\u591a\u500b\u8868\u4e2d\u8cc7\u6599\u7684\u57fa\u672c\u65b9\u6cd5\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u8868\u9023\u63a5\u65b9\u5f0f\uff0c\u8b93\u4f7f\u7528\u8005\u80fd\u5920\u6839\u64da\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u9023\u63a5\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Oracle\u4e2d\u5e38\u898b\u7684\u8868\u9023\u63a5\u65b9\u5f0f\uff0c\u5305\u62ec\u5167\u90e8\u9023\u63a5\u3001\u5916\u90e8\u9023\u63a5\u3001\u4ea4\u53c9\u9023\u63a5\u548c\u81ea\u6211\u9023\u63a5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u7bc4\u4f8b\u4ee5\u4fbf\u65bc\u7406\u89e3\u3002<\/p>\n<h2 id=\"1-%e5%85%a7%e9%83%a8%e9%80%a3%e6%8e%a5-inner-join-FsYHRQkCNY\">1. \u5167\u90e8\u9023\u63a5 (INNER JOIN)<\/h2>\n<p>\u5167\u90e8\u9023\u63a5\u662f\u6700\u5e38\u7528\u7684\u9023\u63a5\u65b9\u5f0f\uff0c\u5b83\u53ea\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7b26\u5408\u9023\u63a5\u689d\u4ef6\u7684\u8a18\u9304\u3002\u7576\u67e5\u8a62\u4e2d\u6709\u591a\u500b\u8868\u6642\uff0c\u5167\u90e8\u9023\u63a5\u6703\u6839\u64da\u6307\u5b9a\u7684\u689d\u4ef6\u904e\u6ffe\u51fa\u7b26\u5408\u7684\u8cc7\u6599\u3002<\/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<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u53ea\u6709\u7576<a>table_a<\/a>\u548c<a>table_b<\/a>\u4e2d\u6709\u76f8\u540c\u7684<a>common_column<\/a>\u503c\u6642\uff0c\u624d\u6703\u8fd4\u56de\u76f8\u61c9\u7684\u8cc7\u6599\u3002<\/p>\n<h2 id=\"2-%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5-outer-join-FsYHRQkCNY\">2. \u5916\u90e8\u9023\u63a5 (OUTER JOIN)<\/h2>\n<p>\u5916\u90e8\u9023\u63a5\u5206\u70ba\u5de6\u5916\u90e8\u9023\u63a5\u3001\u53f3\u5916\u90e8\u9023\u63a5\u548c\u5168\u5916\u90e8\u9023\u63a5\u3002\u5b83\u5011\u7684\u4e3b\u8981\u7279\u9ede\u662f\u5373\u4f7f\u5728\u4e00\u500b\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\uff0c\u4ecd\u7136\u6703\u8fd4\u56de\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\u3002<\/p>\n<h3 id=\"2-1-%e5%b7%a6%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5-left-outer-join-FsYHRQkCNY\">2.1 \u5de6\u5916\u90e8\u9023\u63a5 (LEFT OUTER JOIN)<\/h3>\n<p>\u5de6\u5916\u90e8\u9023\u63a5\u8fd4\u56de\u5de6\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u4ee5\u53ca\u53f3\u8868\u4e2d\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002\u5982\u679c\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\uff0c\u5247\u7d50\u679c\u4e2d\u6703\u986f\u793aNULL\u3002<\/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=\"2-2-%e5%8f%b3%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5-right-outer-join-FsYHRQkCNY\">2.2 \u53f3\u5916\u90e8\u9023\u63a5 (RIGHT OUTER JOIN)<\/h3>\n<p>\u53f3\u5916\u90e8\u9023\u63a5\u5247\u662f\u8fd4\u56de\u53f3\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u4ee5\u53ca\u5de6\u8868\u4e2d\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002\u5982\u679c\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\uff0c\u5247\u7d50\u679c\u4e2d\u6703\u986f\u793aNULL\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nRIGHT OUTER JOIN table_b b ON a.common_column = b.common_column;<\/code><\/pre>\n<h3 id=\"2-3-%e5%85%a8%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5-full-outer-join-FsYHRQkCNY\">2.3 \u5168\u5916\u90e8\u9023\u63a5 (FULL OUTER JOIN)<\/h3>\n<p>\u5168\u5916\u90e8\u9023\u63a5\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u7684\u8a18\u9304\u3002\u5982\u679c\u67d0\u4e00\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\uff0c\u5247\u7d50\u679c\u4e2d\u6703\u986f\u793aNULL\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nFULL OUTER JOIN table_b b ON a.common_column = b.common_column;<\/code><\/pre>\n<h2 id=\"3-%e4%ba%a4%e5%8f%89%e9%80%a3%e6%8e%a5-cross-join-FsYHRQkCNY\">3. \u4ea4\u53c9\u9023\u63a5 (CROSS JOIN)<\/h2>\n<p>\u4ea4\u53c9\u9023\u63a5\u8fd4\u56de\u5169\u500b\u8868\u7684\u7b1b\u5361\u723e\u7a4d\uff0c\u5373\u6bcf\u4e00\u500b\u5de6\u8868\u7684\u8a18\u9304\u90fd\u6703\u8207\u53f3\u8868\u7684\u6bcf\u4e00\u500b\u8a18\u9304\u9032\u884c\u914d\u5c0d\u3002\u9019\u7a2e\u9023\u63a5\u65b9\u5f0f\u901a\u5e38\u4e0d\u5e36\u6709\u4efb\u4f55\u689d\u4ef6\uff0c\u7d50\u679c\u96c6\u7684\u5927\u5c0f\u662f\u5169\u500b\u8868\u8a18\u9304\u6578\u7684\u4e58\u7a4d\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM table_a a\nCROSS JOIN table_b b;<\/code><\/pre>\n<h2 id=\"4-%e8%87%aa%e6%88%91%e9%80%a3%e6%8e%a5-self-join-FsYHRQkCNY\">4. \u81ea\u6211\u9023\u63a5 (SELF JOIN)<\/h2>\n<p>\u81ea\u6211\u9023\u63a5\u662f\u6307\u4e00\u500b\u8868\u8207\u81ea\u8eab\u9032\u884c\u9023\u63a5\u3002\u9019\u7a2e\u65b9\u5f0f\u901a\u5e38\u7528\u65bc\u67e5\u8a62\u8868\u4e2d\u76f8\u4e92\u95dc\u806f\u7684\u8cc7\u6599\u3002<\/p>\n<pre><code>SELECT a.column1, b.column1\nFROM table_a a, table_a b\nWHERE a.common_column = b.common_column;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FsYHRQkCNY\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u8cc7\u6599\u5eab\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u8868\u9023\u63a5\u65b9\u5f0f\u5c0d\u65bc\u67e5\u8a62\u6548\u7387\u548c\u7d50\u679c\u7684\u6e96\u78ba\u6027\u81f3\u95dc\u91cd\u8981\u3002\u5167\u90e8\u9023\u63a5\u3001\u5916\u90e8\u9023\u63a5\u3001\u4ea4\u53c9\u9023\u63a5\u548c\u81ea\u6211\u9023\u63a5\u5404\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u4e86\u89e3\u9019\u4e9b\u9023\u63a5\u65b9\u5f0f\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5e6b\u52a9\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u8cc7\u6599\u67e5\u8a62\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u9805\u76ee\u4e2d\u4f7f\u7528\u9019\u4e9b\u6280\u8853\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u4e2d\u591a\u7a2e\u8868\u9023\u63a5\u65b9\u5f0f\u7684\u8a73\u7d30\u89e3\u91cb\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\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-191476","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191476","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=191476"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191476\/revisions"}],"predecessor-version":[{"id":191477,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191476\/revisions\/191477"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=191476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=191476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=191476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}