{"id":180584,"date":"2024-11-09T11:29:17","date_gmt":"2024-11-09T03:29:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180584\/"},"modified":"2024-11-09T11:29:18","modified_gmt":"2024-11-09T03:29:18","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e8%ae%80oracle%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180584\/","title":{"rendered":"\u6df1\u5165\u89e3\u8b80Oracle\u4fee\u6539\u8868\u7d50\u69cb"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e8%a7%a3%e8%ae%80oracle%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b-PiqpQChAvE\">\u6df1\u5165\u89e3\u8b80Oracle\u4fee\u6539\u8868\u7d50\u69cb<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u8868\u7d50\u69cb\u7684\u4fee\u6539\u662f\u4e00\u9805\u5e38\u898b\u4e14\u91cd\u8981\u7684\u4efb\u52d9\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u4fee\u6539\u8868\u7684\u7d50\u69cb\uff0c\u9019\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u6839\u64da\u9700\u6c42\u8abf\u6574\u8cc7\u6599\u8868\u7684\u8a2d\u8a08\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u4e2d\u4fee\u6539\u8868\u7d50\u69cb\u7684\u5404\u7a2e\u65b9\u6cd5\u53ca\u5176\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"1-%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-PiqpQChAvE\">1. \u4fee\u6539\u8868\u7d50\u69cb\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u8868\u7d50\u69cb\u7684\u4fee\u6539\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li>\u6dfb\u52a0\u65b0\u6b04\u4f4d<\/li>\n<li>\u522a\u9664\u73fe\u6709\u6b04\u4f4d<\/li>\n<li>\u4fee\u6539\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b<\/li>\n<li>\u91cd\u547d\u540d\u6b04\u4f4d\u6216\u8868<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u901a\u904e\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u5be6\u73fe\uff0c\u5177\u9ad4\u7684\u8a9e\u6cd5\u548c\u65b9\u6cd5\u5c07\u5728\u5f8c\u7e8c\u90e8\u5206\u8a73\u7d30\u4ecb\u7d39\u3002<\/p>\n<h2 id=\"2-%e6%b7%bb%e5%8a%a0%e6%96%b0%e6%ac%84%e4%bd%8d-PiqpQChAvE\">2. \u6dfb\u52a0\u65b0\u6b04\u4f4d<\/h2>\n<p>\u8981\u5728Oracle\u4e2d\u5411\u73fe\u6709\u8868\u4e2d\u6dfb\u52a0\u65b0\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u6dfb\u52a0\u65b0\u6b04\u4f4d\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD (\u65b0\u6b04\u4f4d\u540d \u6578\u64da\u985e\u578b);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u540d\u70ba\u201cbirthdate\u201d\u7684\u65e5\u671f\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE employees ADD (birthdate DATE);<\/code><\/pre>\n<h2 id=\"3-%e5%88%aa%e9%99%a4%e7%8f%be%e6%9c%89%e6%ac%84%e4%bd%8d-PiqpQChAvE\">3. \u522a\u9664\u73fe\u6709\u6b04\u4f4d<\/h2>\n<p>\u522a\u9664\u6b04\u4f4d\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\uff0c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP COLUMN \u6b04\u4f4d\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e\u201cemployees\u201d\u8868\u4e2d\u522a\u9664\u201cbirthdate\u201d\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE employees DROP COLUMN birthdate;<\/code><\/pre>\n<h2 id=\"4-%e4%bf%ae%e6%94%b9%e6%ac%84%e4%bd%8d%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-PiqpQChAvE\">4. \u4fee\u6539\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5982\u679c\u9700\u8981\u66f4\u6539\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4e2d\u7684MODIFY\u5b50\u53e5\u3002\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY (\u6b04\u4f4d\u540d \u65b0\u6578\u64da\u985e\u578b);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u201cemployees\u201d\u8868\u4e2d\u7684\u201csalary\u201d\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u5f9eNUMBER\u6539\u70baFLOAT\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE employees MODIFY (salary FLOAT);<\/code><\/pre>\n<h2 id=\"5-%e9%87%8d%e5%91%bd%e5%90%8d%e6%ac%84%e4%bd%8d%e6%88%96%e8%a1%a8-PiqpQChAvE\">5. \u91cd\u547d\u540d\u6b04\u4f4d\u6216\u8868<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u91cd\u547d\u540d\u6b04\u4f4d\u6216\u6574\u500b\u8868\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u8a9e\u6cd5\u5be6\u73fe\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d RENAME COLUMN \u820a\u6b04\u4f4d\u540d TO \u65b0\u6b04\u4f4d\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u201cemployees\u201d\u8868\u4e2d\u7684\u201cbirthdate\u201d\u6b04\u4f4d\u91cd\u547d\u540d\u70ba\u201cdate_of_birth\u201d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE employees RENAME COLUMN birthdate TO date_of_birth;<\/code><\/pre>\n<p>\u82e5\u8981\u91cd\u547d\u540d\u6574\u500b\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u820a\u8868\u540d RENAME TO \u65b0\u8868\u540d;<\/code><\/pre>\n<h2 id=\"6-%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-PiqpQChAvE\">6. \u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4fee\u6539\u8868\u7d50\u69cb\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u7279\u5225\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5728\u522a\u9664\u6b04\u4f4d\u4e4b\u524d\uff0c\u78ba\u4fdd\u8a72\u6b04\u4f4d\u4e0d\u518d\u88ab\u4efb\u4f55\u61c9\u7528\u7a0b\u5e8f\u6216\u67e5\u8a62\u4f7f\u7528\u3002<\/li>\n<li>\u4fee\u6539\u6578\u64da\u985e\u578b\u6642\uff0c\u9700\u78ba\u8a8d\u65b0\u985e\u578b\u80fd\u5920\u5bb9\u7d0d\u73fe\u6709\u6578\u64da\u3002<\/li>\n<li>\u91cd\u547d\u540d\u6b04\u4f4d\u6216\u8868\u6642\uff0c\u9700\u66f4\u65b0\u6240\u6709\u76f8\u95dc\u7684\u67e5\u8a62\u548c\u61c9\u7528\u7a0b\u5e8f\u4ee3\u78bc\u3002<\/li>\n<li>\u5728\u9032\u884c\u7d50\u69cb\u4fee\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u8cc7\u6599\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PiqpQChAvE\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u5de5\u5177\u4f86\u4fee\u6539\u8868\u7d50\u69cb\uff0c\u7121\u8ad6\u662f\u6dfb\u52a0\u3001\u522a\u9664\u9084\u662f\u4fee\u6539\u6b04\u4f4d\uff0c\u90fd\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684SQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u8cc7\u6599\u5eab\u7ba1\u7406\u7684\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u6280\u8853\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u8b80Oracle\u4fee\u6539\u8868\u7d50\u69cb\uff0c\u63a2\u7d22\u5982\u4f55\u6709\u6548\u8abf\u6574\u6578\u64da\u5eab\u67b6\u69cb\u4ee5\u63d0\u5347\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-180584","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180584","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=180584"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180584\/revisions"}],"predecessor-version":[{"id":180585,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180584\/revisions\/180585"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}