{"id":96014,"date":"2024-10-20T05:53:17","date_gmt":"2024-10-19T21:53:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96014\/"},"modified":"2024-10-20T05:53:17","modified_gmt":"2024-10-19T21:53:17","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e9%87%8d%e5%ae%9a%e7%be%a9%e8%a1%a8%e7%9a%84%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96014\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u4e2d\u91cd\u5b9a\u7fa9\u8868\u7684\u4ecb\u7d39"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e9%87%8d%e5%ae%9a%e7%be%a9%e8%a1%a8%e7%9a%84%e4%bb%8b%e7%b4%b9-VSscprKhqL\">Oracle\u6578\u64da\u5eab\u4e2d\u91cd\u5b9a\u7fa9\u8868\u7684\u4ecb\u7d39<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u91cd\u5b9a\u7fa9\u8868\u662f\u4e00\u500b\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5728\u4e0d\u5f71\u97ff\u73fe\u6709\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u8868\u7d50\u69cb\u9032\u884c\u4fee\u6539\u3002\u9019\u4e00\u529f\u80fd\u7279\u5225\u9069\u7528\u65bc\u9700\u8981\u9032\u884c\u7d50\u69cb\u8abf\u6574\u7684\u60c5\u6cc1\uff0c\u4f8b\u5982\u6dfb\u52a0\u6216\u522a\u9664\u5217\u3001\u6539\u8b8a\u5217\u7684\u6578\u64da\u985e\u578b\u7b49\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u4e2d\u91cd\u5b9a\u7fa9\u8868\u7684\u6982\u5ff5\u3001\u4f7f\u7528\u60c5\u5883\u53ca\u5176\u64cd\u4f5c\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"%e9%87%8d%e5%ae%9a%e7%be%a9%e8%a1%a8%e7%9a%84%e6%a6%82%e5%bf%b5-VSscprKhqL\">\u91cd\u5b9a\u7fa9\u8868\u7684\u6982\u5ff5<\/h2>\n<p>\u91cd\u5b9a\u7fa9\u8868\uff08Table Redefinition\uff09\u662fOracle\u63d0\u4f9b\u7684\u4e00\u7a2e\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5728\u4e0d\u9396\u5b9a\u8868\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u8868\u9032\u884c\u7d50\u69cb\u4e0a\u7684\u8b8a\u66f4\u3002\u9019\u610f\u5473\u8457\u5728\u91cd\u5b9a\u7fa9\u904e\u7a0b\u4e2d\uff0c\u5176\u4ed6\u7528\u6236\u4ecd\u7136\u53ef\u4ee5\u5c0d\u8a72\u8868\u9032\u884c\u67e5\u8a62\u548c\u4fee\u6539\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e86\u6578\u64da\u5eab\u7684\u53ef\u7528\u6027\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%83%85%e5%a2%83-VSscprKhqL\">\u4f7f\u7528\u60c5\u5883<\/h2>\n<p>\u91cd\u5b9a\u7fa9\u8868\u7684\u529f\u80fd\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4f7f\u7528\u60c5\u5883\uff1a<\/p>\n<ul>\n<li><strong>\u6dfb\u52a0\u6216\u522a\u9664\u5217\uff1a<\/strong>\u7576\u9700\u8981\u5c0d\u8868\u7d50\u69cb\u9032\u884c\u64f4\u5c55\u6216\u7c21\u5316\u6642\uff0c\u91cd\u5b9a\u7fa9\u8868\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u3002<\/li>\n<li><strong>\u6539\u8b8a\u5217\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u6539\u8b8a\u67d0\u4e00\u5217\u7684\u6578\u64da\u985e\u578b\uff0c\u9019\u6642\u91cd\u5b9a\u7fa9\u8868\u63d0\u4f9b\u4e86\u4e00\u500b\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/li>\n<li><strong>\u91cd\u65b0\u7d44\u7e54\u6578\u64da\uff1a<\/strong>\u91cd\u5b9a\u7fa9\u8868\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u91cd\u65b0\u7d44\u7e54\u6578\u64da\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%87%8d%e5%ae%9a%e7%be%a9%e8%a1%a8%e7%9a%84%e6%93%8d%e4%bd%9c%e6%ad%a5%e9%a9%9f-VSscprKhqL\">\u91cd\u5b9a\u7fa9\u8868\u7684\u64cd\u4f5c\u6b65\u9a5f<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u91cd\u5b9a\u7fa9\u8868\u7684\u904e\u7a0b\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%ba%96%e5%82%99%e5%b7%a5%e4%bd%9c-VSscprKhqL\">1. \u6e96\u5099\u5de5\u4f5c<\/h3>\n<p>\u5728\u958b\u59cb\u91cd\u5b9a\u7fa9\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u74b0\u5883\u662f\u7a69\u5b9a\u7684\uff0c\u4e26\u4e14\u5c0d\u65bc\u91cd\u5b9a\u7fa9\u7684\u8868\u9032\u884c\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/p>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e9%87%8d%e5%ae%9a%e7%be%a9%e8%a1%a8-VSscprKhqL\">2. \u5275\u5efa\u91cd\u5b9a\u7fa9\u8868<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u5275\u5efa\u4e00\u500b\u65b0\u7684\u91cd\u5b9a\u7fa9\u8868\uff1a<\/p>\n<pre><code>CREATE TABLE new_table AS SELECT * FROM old_table;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u6703\u5275\u5efa\u4e00\u500b\u540d\u70banew_table\u7684\u65b0\u8868\uff0c\u4e26\u5c07old_table\u4e2d\u7684\u6240\u6709\u6578\u64da\u8907\u88fd\u904e\u4f86\u3002<\/p>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e6%96%b0%e8%a1%a8%e7%b5%90%e6%a7%8b-VSscprKhqL\">3. \u4fee\u6539\u65b0\u8868\u7d50\u69cb<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u53ef\u4ee5\u5c0d\u65b0\u8868\u9032\u884c\u7d50\u69cb\u4e0a\u7684\u4fee\u6539\uff0c\u4f8b\u5982\u6dfb\u52a0\u65b0\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE new_table ADD (new_column VARCHAR2(50));<\/code><\/pre>\n<h3 id=\"4-%e6%95%b8%e6%93%9a%e5%90%8c%e6%ad%a5-VSscprKhqL\">4. \u6578\u64da\u540c\u6b65<\/h3>\n<p>\u5728\u91cd\u5b9a\u7fa9\u904e\u7a0b\u4e2d\uff0c\u5fc5\u9808\u78ba\u4fdd\u65b0\u8868\u4e2d\u7684\u6578\u64da\u8207\u820a\u8868\u4fdd\u6301\u540c\u6b65\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u5c07\u820a\u8868\u4e2d\u7684\u65b0\u589e\u6216\u4fee\u6539\u7684\u6578\u64da\u540c\u6b65\u5230\u65b0\u8868\uff1a<\/p>\n<pre><code>INSERT INTO new_table SELECT * FROM old_table WHERE condition;<\/code><\/pre>\n<h3 id=\"5-%e5%88%87%e6%8f%9b%e8%a1%a8-VSscprKhqL\">5. \u5207\u63db\u8868<\/h3>\n<p>\u7576\u65b0\u8868\u7684\u7d50\u69cb\u548c\u6578\u64da\u90fd\u6e96\u5099\u597d\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u5c07\u820a\u8868\u66ff\u63db\u70ba\u65b0\u8868\uff1a<\/p>\n<pre><code>ALTER TABLE old_table RENAME TO old_table_backup;\nALTER TABLE new_table RENAME TO old_table;<\/code><\/pre>\n<h3 id=\"6-%e6%b8%85%e7%90%86%e5%b7%a5%e4%bd%9c-VSscprKhqL\">6. \u6e05\u7406\u5de5\u4f5c<\/h3>\n<p>\u6700\u5f8c\uff0c\u6839\u64da\u9700\u8981\u522a\u9664\u820a\u8868\u7684\u5099\u4efd\uff0c\u91cb\u653e\u7a7a\u9593\uff1a<\/p>\n<pre><code>DROP TABLE old_table_backup;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-VSscprKhqL\">\u7e3d\u7d50<\/h2>\n<p>\u91cd\u5b9a\u7fa9\u8868\u662fOracle\u6578\u64da\u5eab\u4e2d\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5728\u4e0d\u5f71\u97ff\u6578\u64da\u53ef\u7528\u6027\u7684\u60c5\u6cc1\u4e0b\uff0c\u9748\u6d3b\u5730\u8abf\u6574\u8868\u7d50\u69cb\u3002\u901a\u904e\u4e0a\u8ff0\u6b65\u9a5f\uff0c\u7528\u6236\u53ef\u4ee5\u6709\u6548\u5730\u9032\u884c\u8868\u7684\u91cd\u5b9a\u7fa9\uff0c\u5f9e\u800c\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9748\u6d3b\u6027\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0c\u91cd\u5b9a\u7fa9\u8868\u7121\u7591\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u6578\u64da\u5eab\u4e2d\u91cd\u5b9a\u7fa9\u8868\u7684\u6982\u5ff5\u3001\u7528\u9014\u53ca\u5176\u5728\u6578\u64da\u7ba1\u7406\u4e2d\u7684\u91cd\u8981\u6027\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u9748\u6d3b\u6027\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-96014","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96014","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=96014"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96014\/revisions"}],"predecessor-version":[{"id":96015,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96014\/revisions\/96015"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}