{"id":170509,"date":"2024-11-06T22:33:17","date_gmt":"2024-11-06T14:33:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170509\/"},"modified":"2024-11-06T22:33:18","modified_gmt":"2024-11-06T14:33:18","slug":"%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4%e7%9a%84sql%e5%92%8coracle%e7%9a%84%e5%af%ab%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170509\/","title":{"rendered":"\u6279\u91cf\u522a\u9664\u7684SQL\u548coracle\u7684\u5beb\u6cd5"},"content":{"rendered":"<h1 id=\"%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4%e7%9a%84sql%e5%92%8coracle%e7%9a%84%e5%af%ab%e6%b3%95-EptYAslXhz\">\u6279\u91cf\u522a\u9664\u7684SQL\u548cOracle\u7684\u5beb\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6279\u91cf\u522a\u9664\u64cd\u4f5c\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6e05\u7406\u904e\u671f\u6578\u64da\u9084\u662f\u79fb\u9664\u4e0d\u518d\u9700\u8981\u7684\u8a18\u9304\uff0c\u638c\u63e1\u6279\u91cf\u522a\u9664\u7684SQL\u548cOracle\u5beb\u6cd5\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL\u548cOracle\u4e2d\u9032\u884c\u6279\u91cf\u522a\u9664\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"sql%e4%b8%ad%e7%9a%84%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4-EptYAslXhz\">SQL\u4e2d\u7684\u6279\u91cf\u522a\u9664<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u6279\u91cf\u522a\u9664\u901a\u5e38\u4f7f\u7528DELETE\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u522a\u9664\u6240\u6709\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30;<\/code><\/pre>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664\u591a\u500b\u689d\u4ef6\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528AND\u6216OR\u4f86\u7d44\u5408\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u522a\u9664\u6240\u6709\u5e74\u9f61\u5927\u65bc30\u4e14\u72c0\u614b\u70ba\u201cinactive\u201d\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30 AND status = 'inactive';<\/code><\/pre>\n<h3 id=\"%e4%bd%bf%e7%94%a8limit%e9%80%b2%e8%a1%8c%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4-EptYAslXhz\">\u4f7f\u7528LIMIT\u9032\u884c\u6279\u91cf\u522a\u9664<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u76f4\u63a5\u522a\u9664\u5927\u91cf\u6578\u64da\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u70ba\u4e86\u907f\u514d\u9019\u7a2e\u60c5\u6cc1\uff0c\u53ef\u4ee5\u4f7f\u7528LIMIT\u5b50\u53e5\u4f86\u9650\u5236\u6bcf\u6b21\u522a\u9664\u7684\u8a18\u9304\u6578\u91cf\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30 LIMIT 1000;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5206\u6279\u522a\u9664\u8a18\u9304\uff0c\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u6027\u80fd\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"oracle%e4%b8%ad%e7%9a%84%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4-EptYAslXhz\">Oracle\u4e2d\u7684\u6279\u91cf\u522a\u9664<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u6279\u91cf\u522a\u9664\u7684\u57fa\u672c\u8a9e\u6cd5\u8207SQL\u76f8\u4f3c\uff0c\u4f46\u6709\u4e00\u4e9b\u7279\u5b9a\u7684\u529f\u80fd\u548c\u512a\u5316\u3002Oracle\u7684DELETE\u8a9e\u53e5\u4e5f\u53ef\u4ee5\u4f7f\u7528WHERE\u5b50\u53e5\u4f86\u6307\u5b9a\u522a\u9664\u689d\u4ef6\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u522a\u9664\u6240\u6709\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30;<\/code><\/pre>\n<h3 id=\"%e4%bd%bf%e7%94%a8rownum%e9%80%b2%e8%a1%8c%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4-EptYAslXhz\">\u4f7f\u7528ROWNUM\u9032\u884c\u6279\u91cf\u522a\u9664<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u82e5\u8981\u9650\u5236\u522a\u9664\u7684\u8a18\u9304\u6578\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528ROWNUM\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u522a\u9664\u524d1000\u689d\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30 AND ROWNUM &lt;= 1000;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u5beb\u6cd5\u53ef\u4ee5\u6709\u6548\u63a7\u5236\u6bcf\u6b21\u522a\u9664\u7684\u8a18\u9304\u6578\u91cf\uff0c\u5f9e\u800c\u6e1b\u5c11\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8cte%e9%80%b2%e8%a1%8c%e6%89%b9%e9%87%8f%e5%88%aa%e9%99%a4-EptYAslXhz\">\u4f7f\u7528CTE\u9032\u884c\u6279\u91cf\u522a\u9664<\/h3>\n<p>\u5728Oracle 12c\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u516c\u7528\u8868\u8868\u9054\u5f0f\uff08CTE\uff09\u4f86\u9032\u884c\u6279\u91cf\u522a\u9664\u3002\u9019\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u53ef\u8b80\u6027\u548c\u7dad\u8b77\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>WITH to_delete AS (\n    SELECT * FROM users WHERE age &gt; 30 AND ROWNUM &lt;= 1000\n)\nDELETE FROM to_delete;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u5beb\u6cd5\u4e0d\u50c5\u6e05\u6670\uff0c\u9084\u80fd\u6709\u6548\u5730\u7ba1\u7406\u522a\u9664\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-EptYAslXhz\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u57f7\u884c\u6279\u91cf\u522a\u9664\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u9032\u884c\u6578\u64da\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u91cd\u8981\u6578\u64da\u3002<\/li>\n<li>\u5728\u522a\u9664\u5927\u91cf\u6578\u64da\u6642\uff0c\u61c9\u8003\u616e\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u4ee5\u907f\u514d\u56e0\u6279\u91cf\u522a\u9664\u800c\u5c0e\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-EptYAslXhz\">\u7e3d\u7d50<\/h2>\n<p>\u6279\u91cf\u522a\u9664\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u4e00\u9805\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u7121\u8ad6\u662f\u5728SQL\u9084\u662fOracle\u4e2d\uff0c\u90fd\u6709\u5176\u7279\u5b9a\u7684\u5beb\u6cd5\u548c\u6700\u4f73\u5be6\u8e10\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528DELETE\u8a9e\u53e5\u3001LIMIT\u6216ROWNUM\u7b49\u529f\u80fd\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6279\u91cf\u522a\u9664\u5728SQL\u548cOracle\u4e2d\u7684\u5beb\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u64cd\u4f5c\u6d41\u7a0b\uff0c\u78ba\u4fdd\u6578\u64da\u6e96\u78ba\u6027\u548c\u4e00\u81f4\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-170509","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170509","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=170509"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170509\/revisions"}],"predecessor-version":[{"id":170510,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170509\/revisions\/170510"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=170509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=170509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=170509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}