{"id":154467,"date":"2024-11-02T16:03:21","date_gmt":"2024-11-02T08:03:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154467\/"},"modified":"2024-11-02T16:03:22","modified_gmt":"2024-11-02T08:03:22","slug":"%e5%b0%8d-db2-%e5%89%b5%e5%bb%ba%e5%a4%96%e9%8d%b5%e6%99%82%e9%81%b8%e9%a0%85%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%9f%a5%e8%ad%98%e7%9a%84%e8%a9%b3%e7%b4%b0%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154467\/","title":{"rendered":"\u5c0d DB2 \u5275\u5efa\u5916\u9375\u6642\u9078\u9805\u7684\u57fa\u672c\u77e5\u8b58\u7684\u8a73\u7d30\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-db2-%e5%89%b5%e5%bb%ba%e5%a4%96%e9%8d%b5%e6%99%82%e9%81%b8%e9%a0%85%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%9f%a5%e8%ad%98%e7%9a%84%e8%a9%b3%e7%b4%b0%e6%8f%8f%e8%bf%b0-NICPqrZSzc\">\u5c0d DB2 \u5275\u5efa\u5916\u9375\u6642\u9078\u9805\u7684\u57fa\u672c\u77e5\u8b58\u7684\u8a73\u7d30\u63cf\u8ff0<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5916\u9375\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u7d04\u675f\u689d\u4ef6\uff0c\u7528\u65bc\u7dad\u8b77\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002IBM \u7684 DB2 \u8cc7\u6599\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u9805\u4f86\u5275\u5efa\u5916\u9375\uff0c\u9019\u4e9b\u9078\u9805\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u6839\u64da\u5177\u9ad4\u9700\u6c42\u8a2d\u8a08\u8cc7\u6599\u5eab\u7d50\u69cb\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5728 DB2 \u4e2d\u5275\u5efa\u5916\u9375\u6642\u7684\u57fa\u672c\u77e5\u8b58\u548c\u9078\u9805\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%96%e9%8d%b5%ef%bc%9f-NICPqrZSzc\">\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n<p>\u5916\u9375\u662f\u4e00\u500b\u8868\u4e2d\u7684\u4e00\u500b\u6216\u591a\u500b\u6b04\u4f4d\uff0c\u5176\u503c\u5fc5\u9808\u8207\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u4e3b\u9375\u6216\u552f\u4e00\u9375\u7684\u503c\u76f8\u5339\u914d\u3002\u5916\u9375\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u806f\uff0c\u4e26\u78ba\u4fdd\u8cc7\u6599\u7684\u53c3\u7167\u5b8c\u6574\u6027\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u300c\u8a02\u55ae\u300d\u8868\u548c\u4e00\u500b\u300c\u5ba2\u6236\u300d\u8868\uff0c\u8a02\u55ae\u8868\u4e2d\u7684\u300c\u5ba2\u6236ID\u300d\u6b04\u4f4d\u53ef\u4ee5\u8a2d\u7f6e\u70ba\u5916\u9375\uff0c\u53c3\u7167\u5ba2\u6236\u8868\u4e2d\u7684\u300c\u5ba2\u6236ID\u300d\u4e3b\u9375\u3002<\/p>\n<h2 id=\"%e5%9c%a8-db2-%e4%b8%ad%e5%89%b5%e5%bb%ba%e5%a4%96%e9%8d%b5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-NICPqrZSzc\">\u5728 DB2 \u4e2d\u5275\u5efa\u5916\u9375\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 DB2 \u4e2d\uff0c\u5275\u5efa\u5916\u9375\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d\nADD CONSTRAINT \u7d04\u675f\u540d\nFOREIGN KEY (\u5916\u9375\u6b04\u4f4d)\nREFERENCES \u53c3\u7167\u8868 (\u4e3b\u9375\u6b04\u4f4d);\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u300c\u8a02\u55ae\u300d\u8868\u4e2d\u5275\u5efa\u4e00\u500b\u5916\u9375\uff0c\u53c3\u7167\u300c\u5ba2\u6236\u300d\u8868\u7684\u300c\u5ba2\u6236ID\u300d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8a02\u55ae\nADD CONSTRAINT fk_customer\nFOREIGN KEY (\u5ba2\u6236ID)\nREFERENCES \u5ba2\u6236 (\u5ba2\u6236ID);\n<\/code><\/pre>\n<h2 id=\"%e5%a4%96%e9%8d%b5%e9%81%b8%e9%a0%85%e7%9a%84%e8%a9%b3%e7%b4%b0%e6%8f%8f%e8%bf%b0-NICPqrZSzc\">\u5916\u9375\u9078\u9805\u7684\u8a73\u7d30\u63cf\u8ff0<\/h2>\n<p>\u5728\u5275\u5efa\u5916\u9375\u6642\uff0cDB2 \u63d0\u4f9b\u4e86\u5e7e\u500b\u9078\u9805\u4f86\u63a7\u5236\u5916\u9375\u7684\u884c\u70ba\uff0c\u9019\u4e9b\u9078\u9805\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>ON DELETE CASCADE<\/strong>: \u7576\u53c3\u7167\u7684\u4e3b\u8868\u4e2d\u7684\u8a18\u9304\u88ab\u522a\u9664\u6642\uff0c\u6240\u6709\u53c3\u7167\u8a72\u8a18\u9304\u7684\u5916\u9375\u8a18\u9304\u4e5f\u6703\u81ea\u52d5\u88ab\u522a\u9664\u3002<\/li>\n<li><strong>ON DELETE SET NULL<\/strong>: \u7576\u53c3\u7167\u7684\u4e3b\u8868\u4e2d\u7684\u8a18\u9304\u88ab\u522a\u9664\u6642\uff0c\u6240\u6709\u53c3\u7167\u8a72\u8a18\u9304\u7684\u5916\u9375\u6b04\u4f4d\u5c07\u88ab\u8a2d\u7f6e\u70ba NULL\u3002<\/li>\n<li><strong>ON UPDATE CASCADE<\/strong>: \u7576\u53c3\u7167\u7684\u4e3b\u8868\u4e2d\u7684\u4e3b\u9375\u503c\u88ab\u66f4\u65b0\u6642\uff0c\u6240\u6709\u53c3\u7167\u8a72\u8a18\u9304\u7684\u5916\u9375\u6b04\u4f4d\u4e5f\u6703\u81ea\u52d5\u66f4\u65b0\u3002<\/li>\n<li><strong>ON UPDATE SET NULL<\/strong>: \u7576\u53c3\u7167\u7684\u4e3b\u8868\u4e2d\u7684\u4e3b\u9375\u503c\u88ab\u66f4\u65b0\u6642\uff0c\u6240\u6709\u53c3\u7167\u8a72\u8a18\u9304\u7684\u5916\u9375\u6b04\u4f4d\u5c07\u88ab\u8a2d\u7f6e\u70ba NULL\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u9078\u9805\u53ef\u4ee5\u6839\u64da\u696d\u52d9\u9700\u6c42\u9032\u884c\u9078\u64c7\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5e0c\u671b\u5728\u522a\u9664\u5ba2\u6236\u6642\u81ea\u52d5\u522a\u9664\u6240\u6709\u76f8\u95dc\u7684\u8a02\u55ae\uff0c\u53ef\u4ee5\u4f7f\u7528 ON DELETE CASCADE \u9078\u9805\uff1a<\/p>\n<pre><code>ALTER TABLE \u8a02\u55ae\nADD CONSTRAINT fk_customer\nFOREIGN KEY (\u5ba2\u6236ID)\nREFERENCES \u5ba2\u6236 (\u5ba2\u6236ID)\nON DELETE CASCADE;\n<\/code><\/pre>\n<h2 id=\"%e5%a4%96%e9%8d%b5%e7%9a%84%e9%99%90%e5%88%b6-NICPqrZSzc\">\u5916\u9375\u7684\u9650\u5236<\/h2>\n<p>\u5728\u4f7f\u7528\u5916\u9375\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\u9650\u5236\uff1a<\/p>\n<ul>\n<li>\u5916\u9375\u6b04\u4f4d\u5fc5\u9808\u8207\u53c3\u7167\u8868\u4e2d\u7684\u4e3b\u9375\u6216\u552f\u4e00\u9375\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u76f8\u540c\u3002<\/li>\n<li>\u4e00\u500b\u8868\u53ef\u4ee5\u6709\u591a\u500b\u5916\u9375\uff0c\u4f46\u6bcf\u500b\u5916\u9375\u5fc5\u9808\u53c3\u7167\u4e0d\u540c\u7684\u8868\u6216\u4e0d\u540c\u7684\u6b04\u4f4d\u3002<\/li>\n<li>\u5728\u63d2\u5165\u6216\u66f4\u65b0\u5916\u9375\u6b04\u4f4d\u7684\u503c\u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u8a72\u503c\u5728\u53c3\u7167\u8868\u4e2d\u5b58\u5728\uff0c\u5426\u5247\u5c07\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NICPqrZSzc\">\u7e3d\u7d50<\/h2>\n<p>\u5728 DB2 \u4e2d\u5275\u5efa\u5916\u9375\u662f\u4e00\u500b\u91cd\u8981\u7684\u6b65\u9a5f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7dad\u8b77\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u4f7f\u7528\u4e0d\u540c\u7684\u9078\u9805\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u8a2d\u8a08\u8cc7\u6599\u5eab\u7d50\u69cb\u3002\u4e86\u89e3\u5916\u9375\u7684\u57fa\u672c\u77e5\u8b58\u548c\u9078\u9805\uff0c\u5c0d\u65bc\u4efb\u4f55\u8cc7\u6599\u5eab\u7ba1\u7406\u8005\u6216\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u6280\u8853\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5728 DB2 \u4e2d\u5275\u5efa\u5916\u9375\u6642\u7684\u9078\u9805\u53ca\u5176\u57fa\u672c\u77e5\u8b58\uff0c\u5e6b\u52a9\u60a8\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u95dc\u806f\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-154467","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154467","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=154467"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154467\/revisions"}],"predecessor-version":[{"id":154468,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154467\/revisions\/154468"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}