{"id":96252,"date":"2024-10-20T07:52:16","date_gmt":"2024-10-19T23:52:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96252\/"},"modified":"2024-10-20T07:52:16","modified_gmt":"2024-10-19T23:52:16","slug":"oracle%e4%b8%ad%e7%9a%84ddl%e9%8e%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96252\/","title":{"rendered":"Oracle\u4e2d\u7684DDL\u9396"},"content":{"rendered":"<h1 id=\"oracle%e4%b8%ad%e7%9a%84ddl%e9%8e%96-ujHllEFqoO\">Oracle\u4e2d\u7684DDL\u9396<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0cDDL\uff08\u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff09\u64cd\u4f5c\u662f\u7528\u4f86\u5b9a\u7fa9\u548c\u4fee\u6539\u6578\u64da\u7d50\u69cb\u7684\u8a9e\u8a00\uff0c\u5305\u62ec\u5275\u5efa\u3001\u4fee\u6539\u548c\u522a\u9664\u8868\u3001\u7d22\u5f15\u548c\u5176\u4ed6\u6578\u64da\u5eab\u5c0d\u8c61\u3002\u9019\u4e9b\u64cd\u4f5c\u901a\u5e38\u6703\u5f15\u767cDDL\u9396\uff0c\u9019\u4e9b\u9396\u662f\u7528\u4f86\u4fdd\u8b77\u6578\u64da\u7d50\u69cb\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u4e2d\u7684DDL\u9396\u7684\u5de5\u4f5c\u539f\u7406\u3001\u985e\u578b\u53ca\u5176\u5f71\u97ff\u3002<\/p>\n<h2 id=\"ddl%e9%8e%96%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-ujHllEFqoO\">DDL\u9396\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u7576\u57f7\u884cDDL\u64cd\u4f5c\u6642\uff0cOracle\u6703\u81ea\u52d5\u7372\u53d6\u76f8\u61c9\u7684\u9396\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u6703\u8a71\u5728\u540c\u4e00\u6642\u9593\u5c0d\u6578\u64da\u7d50\u69cb\u9032\u884c\u4fee\u6539\u3002\u9019\u4e9b\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u5728\u7d50\u69cb\u8b8a\u66f4\u904e\u7a0b\u4e2d\u51fa\u73fe\u6578\u64da\u640d\u58de\u6216\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u7528\u6236\u57f7\u884c\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u5275\u5efa\u4e00\u500b\u65b0\u8868\u6642\uff1a<\/p>\n<pre><code>CREATE TABLE employees (\n    id NUMBER PRIMARY KEY,\n    name VARCHAR2(100)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u904e\u7a0b\u4e2d\uff0cOracle\u6703\u7372\u53d6\u4e00\u500bDDL\u9396\uff0c\u9019\u6a23\u5176\u4ed6\u7528\u6236\u5c31\u7121\u6cd5\u5728\u6b64\u671f\u9593\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"ddl%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b-ujHllEFqoO\">DDL\u9396\u7684\u985e\u578b<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u4e3b\u8981\u6709\u5169\u7a2e\u985e\u578b\u7684DDL\u9396\uff1a<\/p>\n<ul>\n<li><strong>\u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/strong>\uff1a\u7576\u4e00\u500b\u6703\u8a71\u7372\u53d6\u6392\u4ed6\u9396\u6642\uff0c\u5176\u4ed6\u6703\u8a71\u7121\u6cd5\u5c0d\u8a72\u5c0d\u8c61\u9032\u884c\u4efb\u4f55DDL\u64cd\u4f5c\u3002\u9019\u662f\u6700\u5e38\u898b\u7684DDL\u9396\u985e\u578b\u3002<\/li>\n<li><strong>\u5171\u4eab\u9396\uff08Shared Lock\uff09<\/strong>\uff1a\u5171\u4eab\u9396\u5141\u8a31\u591a\u500b\u6703\u8a71\u540c\u6642\u8b80\u53d6\u5c0d\u8c61\uff0c\u4f46\u4e0d\u5141\u8a31\u4efb\u4f55\u6703\u8a71\u9032\u884cDDL\u64cd\u4f5c\u3002\u9019\u7a2e\u9396\u901a\u5e38\u5728\u67e5\u8a62\u64cd\u4f5c\u4e2d\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"ddl%e9%8e%96%e7%9a%84%e5%bd%b1%e9%9f%bf-ujHllEFqoO\">DDL\u9396\u7684\u5f71\u97ff<\/h2>\n<p>DDL\u9396\u7684\u5b58\u5728\u5c0d\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u6709\u8457\u91cd\u8981\u5f71\u97ff\u3002\u7576\u4e00\u500b\u6703\u8a71\u6301\u6709DDL\u9396\u6642\uff0c\u5176\u4ed6\u6703\u8a71\u53ef\u80fd\u6703\u88ab\u963b\u585e\uff0c\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u500b\u7528\u6236\u6b63\u5728\u57f7\u884c\u4e00\u500b\u9577\u6642\u9593\u904b\u884c\u7684DDL\u64cd\u4f5c\uff0c\u5176\u4ed6\u7528\u6236\u5728\u6b64\u671f\u9593\u5c07\u7121\u6cd5\u5c0d\u8a72\u5c0d\u8c61\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u696d\u52d9\u6d41\u7a0b\u3002<\/p>\n<p>\u70ba\u4e86\u6e1b\u5c11DDL\u9396\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\uff0c\u5efa\u8b70\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u5c07DDL\u64cd\u4f5c\u5b89\u6392\u5728\u696d\u52d9\u4f4e\u5cf0\u671f\u9032\u884c\u3002<\/li>\n<li>\u4f7f\u7528\u5c0f\u7bc4\u570d\u7684DDL\u64cd\u4f5c\uff0c\u907f\u514d\u4e00\u6b21\u6027\u4fee\u6539\u5927\u91cf\u6578\u64da\u7d50\u69cb\u3002<\/li>\n<li>\u5728\u57f7\u884cDDL\u64cd\u4f5c\u4e4b\u524d\uff0c\u78ba\u4fdd\u6c92\u6709\u5176\u4ed6\u6703\u8a71\u6b63\u5728\u4f7f\u7528\u8a72\u5c0d\u8c61\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%aa%a2%e6%9f%a5ddl%e9%8e%96-ujHllEFqoO\">\u5982\u4f55\u6aa2\u67e5DDL\u9396<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5de5\u5177\u548c\u67e5\u8a62\u4f86\u6aa2\u67e5\u7576\u524d\u7684DDL\u9396\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u67e5\u770b\u7576\u524d\u6301\u6709\u7684\u9396\uff1a<\/p>\n<pre><code>SELECT * FROM v$lock WHERE type = 'D';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u7576\u524d\u7684DDL\u9396\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u8b58\u5225\u53ef\u80fd\u7684\u9396\u5b9a\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-ujHllEFqoO\">\u7d50\u8ad6<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0cDDL\u9396\u662f\u78ba\u4fdd\u6578\u64da\u7d50\u69cb\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6a5f\u5236\u3002\u4e86\u89e3DDL\u9396\u7684\u5de5\u4f5c\u539f\u7406\u3001\u985e\u578b\u53ca\u5176\u5f71\u97ff\uff0c\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u4eba\u54e1\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5408\u7406\u5b89\u6392DDL\u64cd\u4f5c\u548c\u4f7f\u7528\u9069\u7576\u7684\u67e5\u8a62\u5de5\u5177\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11DDL\u9396\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u3001<code>\u4f3a\u670d\u5668<\/code>\u3001<code>\u4e91\u4f3a\u670d\u5668<\/code>\u53ca<code>\u9999\u6e2f\u4f3a\u670d\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u4e2d\u7684DDL\u9396\uff0c\u5982\u4f55\u5f71\u97ff\u6578\u64da\u5eab\u64cd\u4f5c\u53ca\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\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-96252","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96252","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=96252"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96252\/revisions"}],"predecessor-version":[{"id":96253,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96252\/revisions\/96253"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}