{"id":94988,"date":"2024-10-19T21:18:19","date_gmt":"2024-10-19T13:18:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94988\/"},"modified":"2024-10-19T21:18:20","modified_gmt":"2024-10-19T13:18:20","slug":"oracle%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96%e7%9a%84%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94988\/","title":{"rendered":"Oracle\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5"},"content":{"rendered":"<h1 id=\"oracle%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96%e7%9a%84%e8%aa%9e%e6%b3%95-DAmjhVyvFi\">Oracle\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u8996\u5716\u662f\u4e00\u7a2e\u865b\u64ec\u8868\u683c\uff0c\u5b83\u662f\u57fa\u65bc\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u3002\u8996\u5716\u4e0d\u6703\u5132\u5b58\u6578\u64da\uff0c\u800c\u662f\u52d5\u614b\u751f\u6210\uff0c\u9019\u4f7f\u5f97\u5b83\u5011\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u975e\u5e38\u6709\u7528\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u5275\u5efa\u8996\u5716\u7684\u529f\u80fd\uff0c\u8b93\u7528\u6236\u80fd\u5920\u7c21\u5316\u67e5\u8a62\u3001\u63d0\u9ad8\u5b89\u5168\u6027\u4ee5\u53ca\u589e\u5f37\u6578\u64da\u7684\u53ef\u8b80\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e8%a6%96%e5%9c%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-DAmjhVyvFi\">\u8996\u5716\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u8996\u5716\u662f\u4e00\u500b\u547d\u540d\u7684\u67e5\u8a62\uff0c\u7576\u7528\u6236\u67e5\u8a62\u8996\u5716\u6642\uff0c\u5be6\u969b\u4e0a\u662f\u57f7\u884c\u8a72\u67e5\u8a62\u3002\u8996\u5716\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u8868\u683c\uff0c\u4e26\u4e14\u53ef\u4ee5\u5305\u542b\u904e\u6ffe\u689d\u4ef6\u3001\u6392\u5e8f\u548c\u8a08\u7b97\u5b57\u6bb5\u3002\u4f7f\u7528\u8996\u5716\u7684\u597d\u8655\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u7c21\u5316\u8907\u96dc\u67e5\u8a62\uff1a\u7528\u6236\u53ef\u4ee5\u901a\u904e\u8996\u5716\u4f86\u7c21\u5316\u5c0d\u591a\u500b\u8868\u7684\u67e5\u8a62\u3002<\/li>\n<li>\u63d0\u9ad8\u5b89\u5168\u6027\uff1a\u901a\u904e\u9650\u5236\u7528\u6236\u5c0d\u5e95\u5c64\u8868\u7684\u8a2a\u554f\uff0c\u8996\u5716\u53ef\u4ee5\u4fdd\u8b77\u654f\u611f\u6578\u64da\u3002<\/li>\n<li>\u6578\u64da\u62bd\u8c61\uff1a\u8996\u5716\u53ef\u4ee5\u63d0\u4f9b\u4e00\u500b\u66f4\u6613\u65bc\u7406\u89e3\u7684\u6578\u64da\u7d50\u69cb\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96%e7%9a%84%e8%aa%9e%e6%b3%95-DAmjhVyvFi\">\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u5275\u5efa\u8996\u5716\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE [OR REPLACE] VIEW view_name AS\n    SELECT column1, column2, ...\n    FROM table_name\n    [WHERE condition];<\/code><\/pre>\n<p>\u9019\u88e1\u7684\u5404\u500b\u90e8\u5206\u89e3\u91cb\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>CREATE VIEW<\/strong>\uff1a\u9019\u662f\u5275\u5efa\u8996\u5716\u7684\u95dc\u9375\u5b57\u3002<\/li>\n<li><strong>OR REPLACE<\/strong>\uff1a\u9019\u662f\u4e00\u500b\u53ef\u9078\u7684\u95dc\u9375\u5b57\uff0c\u5141\u8a31\u7528\u6236\u5728\u8996\u5716\u5df2\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u66ff\u63db\u3002<\/li>\n<li><strong>view_name<\/strong>\uff1a\u7528\u6236\u81ea\u5b9a\u7fa9\u7684\u8996\u5716\u540d\u7a31\u3002<\/li>\n<li><strong>SELECT<\/strong>\uff1a\u7528\u65bc\u5b9a\u7fa9\u8996\u5716\u7684\u67e5\u8a62\u3002<\/li>\n<li><strong>FROM<\/strong>\uff1a\u6307\u5b9a\u6578\u64da\u4f86\u6e90\u7684\u8868\u683c\u3002<\/li>\n<li><strong>WHERE<\/strong>\uff1a\u53ef\u9078\u7684\u689d\u4ef6\uff0c\u7528\u65bc\u904e\u6ffe\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-DAmjhVyvFi\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u8996\u5716\u7684\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\u683c\uff0c\u5305\u542b\u54e1\u5de5\u7684\u8a73\u7d30\u4fe1\u606f\uff1a<\/p>\n<pre><code>CREATE VIEW employee_view AS\n    SELECT employee_id, first_name, last_name, department_id\n    FROM employees\n    WHERE status = 'active';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>employee_view<\/code> \u7684\u8996\u5716\uff0c\u8a72\u8996\u5716\u53ea\u986f\u793a\u72c0\u614b\u70ba\u201cactive\u201d\u7684\u54e1\u5de5\u4fe1\u606f\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u9019\u500b\u8996\u5716\u4f86\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM employee_view;<\/code><\/pre>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e8%a6%96%e5%9c%96-DAmjhVyvFi\">\u66f4\u65b0\u8996\u5716<\/h2>\n<p>\u5982\u679c\u9700\u8981\u66f4\u65b0\u5df2\u5b58\u5728\u7684\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>CREATE OR REPLACE VIEW<\/code> \u8a9e\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE OR REPLACE VIEW employee_view AS\n    SELECT employee_id, first_name, last_name, department_id, hire_date\n    FROM employees\n    WHERE status = 'active';<\/code><\/pre>\n<p>\u9019\u6a23\u5c31\u53ef\u4ee5\u5728\u4e0d\u522a\u9664\u539f\u6709\u8996\u5716\u7684\u60c5\u6cc1\u4e0b\u66f4\u65b0\u5176\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e5%88%aa%e9%99%a4%e8%a6%96%e5%9c%96-DAmjhVyvFi\">\u522a\u9664\u8996\u5716<\/h2>\n<p>\u5982\u679c\u4e0d\u518d\u9700\u8981\u67d0\u500b\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u522a\u9664\u5b83\uff1a<\/p>\n<pre><code>DROP VIEW view_name;<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>DROP VIEW employee_view;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-DAmjhVyvFi\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u7684\u8996\u5716\u529f\u80fd\u70ba\u6578\u64da\u5eab\u7ba1\u7406\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u5b89\u5168\u6027\u3002\u901a\u904e\u4f7f\u7528\u8996\u5716\uff0c\u7528\u6236\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u3001\u4fdd\u8b77\u6578\u64da\u4ee5\u53ca\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8b80\u6027\u3002\u7121\u8ad6\u662f\u5728\u65e5\u5e38\u7684\u6578\u64da\u64cd\u4f5c\u9084\u662f\u8907\u96dc\u7684\u6578\u64da\u5206\u6790\u4e2d\uff0c\u8996\u5716\u90fd\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5\uff0c\u638c\u63e1\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u5b9a\u7fa9\u548c\u7ba1\u7406\u6578\u64da\u8996\u5716\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-94988","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94988","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=94988"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94988\/revisions"}],"predecessor-version":[{"id":94989,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94988\/revisions\/94989"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}