{"id":95452,"date":"2024-10-20T01:10:18","date_gmt":"2024-10-19T17:10:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95452\/"},"modified":"2024-10-20T01:10:19","modified_gmt":"2024-10-19T17:10:19","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e5%a6%82%e4%bd%95%e5%88%aa%e9%99%a4%e8%a1%a8%e4%b8%ad%e7%9a%84%e4%b8%80%e5%80%8b%e5%ad%97%e6%ae%b5%ef%bc%9f-oracle%e5%88%aa%e9%99%a4%e8%a1%a8%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95452\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\uff1a\u5982\u4f55\u522a\u9664\u8868\u4e2d\u7684\u4e00\u500b\u5b57\u6bb5\uff1f (oracle\u522a\u9664\u8868\u4e2d\u7684\u4e00\u500b\u5b57\u6bb5\u7684\u6578\u64da\u5eab\u8868)"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e5%a6%82%e4%bd%95%e5%88%aa%e9%99%a4%e8%a1%a8%e4%b8%ad%e7%9a%84%e4%b8%80%e5%80%8b%e5%ad%97%e6%ae%b5%ef%bc%9f-kMTcYjkKDM\">Oracle\u6578\u64da\u5eab\uff1a\u5982\u4f55\u522a\u9664\u8868\u4e2d\u7684\u4e00\u500b\u5b57\u6bb5\uff1f<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u7ba1\u7406\u6578\u64da\u8868\u7684\u7d50\u69cb\u662f\u65e5\u5e38\u6578\u64da\u5eab\u7ba1\u7406\u7684\u91cd\u8981\u4efb\u52d9\u4e4b\u4e00\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u53ef\u80fd\u9700\u8981\u522a\u9664\u67d0\u4e9b\u5b57\u6bb5\u4ee5\u4fdd\u6301\u6578\u64da\u7684\u6574\u6f54\u548c\u6709\u6548\u6027\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u522a\u9664\u8868\u4e2d\u7684\u4e00\u500b\u5b57\u6bb5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e5%88%aa%e9%99%a4%e5%ad%97%e6%ae%b5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-kMTcYjkKDM\">\u522a\u9664\u5b57\u6bb5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u522a\u9664\u8868\u4e2d\u7684\u5b57\u6bb5\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP COLUMN \u5217\u540d;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7684\u542b\u7fa9\u662f\uff1a\u5c0d\u6307\u5b9a\u7684\u8868\u9032\u884c\u7d50\u69cb\u4fee\u6539\uff0c\u522a\u9664\u6307\u5b9a\u7684\u5217\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u522a\u9664\u5b57\u6bb5\u5f8c\uff0c\u8a72\u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u6578\u64da\u5c07\u6c38\u4e45\u4e1f\u5931\uff0c\u56e0\u6b64\u5728\u57f7\u884c\u6b64\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%88%aa%e9%99%a4%e5%ad%97%e6%ae%b5-kMTcYjkKDM\">\u793a\u4f8b\uff1a\u522a\u9664\u5b57\u6bb5<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201c\u54e1\u5de5\u201d\u7684\u8868\uff0c\u8a72\u8868\u7684\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE \u54e1\u5de5 (\n    \u54e1\u5de5ID NUMBER PRIMARY KEY,\n    \u59d3\u540d VARCHAR2(50),\n    \u5e74\u9f61 NUMBER,\n    \u8077\u4f4d VARCHAR2(50)\n);<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u6c7a\u5b9a\u522a\u9664\u201c\u5e74\u9f61\u201d\u9019\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE \u54e1\u5de5 DROP COLUMN \u5e74\u9f61;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u201c\u5e74\u9f61\u201d\u5b57\u6bb5\u5c07\u88ab\u522a\u9664\uff0c\u4e26\u4e14\u8a72\u5b57\u6bb5\u4e2d\u7684\u6240\u6709\u6578\u64da\u4e5f\u6703\u88ab\u6c38\u4e45\u522a\u9664\u3002<\/p>\n<h2 id=\"%e5%88%aa%e9%99%a4%e5%a4%9a%e5%80%8b%e5%ad%97%e6%ae%b5-kMTcYjkKDM\">\u522a\u9664\u591a\u500b\u5b57\u6bb5<\/h2>\n<p>\u5982\u679c\u9700\u8981\u540c\u6642\u522a\u9664\u591a\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u5728DROP COLUMN\u5f8c\u5217\u51fa\u6240\u6709\u8981\u522a\u9664\u7684\u5b57\u6bb5\uff0c\u4e26\u7528\u9017\u865f\u5206\u9694\u3002\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP (\u5217\u540d1, \u5217\u540d2, ...);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u540c\u6642\u522a\u9664\u201c\u5e74\u9f61\u201d\u548c\u201c\u8077\u4f4d\u201d\u9019\u5169\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE \u54e1\u5de5 DROP (\u5e74\u9f61, \u8077\u4f4d);<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-kMTcYjkKDM\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u522a\u9664\u5b57\u6bb5\u4e4b\u524d\uff0c\u52d9\u5fc5\u78ba\u8a8d\u8a72\u5b57\u6bb5\u4e0d\u518d\u88ab\u4efb\u4f55\u61c9\u7528\u7a0b\u5e8f\u6216\u5831\u544a\u4f7f\u7528\u3002<\/li>\n<li>\u522a\u9664\u5b57\u6bb5\u5f8c\uff0c\u7121\u6cd5\u6062\u5fa9\uff0c\u56e0\u6b64\u5efa\u8b70\u5728\u522a\u9664\u4e4b\u524d\u9032\u884c\u6578\u64da\u5099\u4efd\u3002<\/li>\n<li>\u5982\u679c\u8868\u4e2d\u6709\u5916\u9375\u7d04\u675f\uff0c\u5247\u5728\u522a\u9664\u5b57\u6bb5\u4e4b\u524d\u9700\u8981\u5148\u522a\u9664\u76f8\u95dc\u7684\u7d04\u675f\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u522a\u9664\u5b57\u6bb5\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u8868\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u8868\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-kMTcYjkKDM\">\u7d50\u8ad6<\/h2>\n<p>\u522a\u9664Oracle\u6578\u64da\u5eab\u8868\u4e2d\u7684\u5b57\u6bb5\u662f\u4e00\u500b\u7c21\u55ae\u4f46\u9700\u8981\u8b39\u614e\u64cd\u4f5c\u7684\u904e\u7a0b\u3002\u901a\u904e\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u7ba1\u7406\u6578\u64da\u8868\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6574\u6f54\u548c\u6709\u6548\u6027\u3002\u5728\u9032\u884c\u6b64\u985e\u64cd\u4f5c\u6642\uff0c\u52d9\u5fc5\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e1f\u5931\u6216\u7cfb\u7d71\u6545\u969c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u5176\u4ed6\u6280\u8853\u652f\u6301\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u60a8\u7684\u6578\u64da\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u522a\u9664\u8868\u4e2d\u7684\u4e00\u500b\u5b57\u6bb5\uff0c\u7c21\u55ae\u6b65\u9a5f\u8207\u6ce8\u610f\u4e8b\u9805\uff0c\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u6578\u64da\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-95452","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95452","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=95452"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95452\/revisions"}],"predecessor-version":[{"id":95453,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95452\/revisions\/95453"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}