{"id":174933,"date":"2024-11-08T00:58:18","date_gmt":"2024-11-07T16:58:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174933\/"},"modified":"2024-11-08T00:58:19","modified_gmt":"2024-11-07T16:58:19","slug":"%e5%a6%82%e4%bd%95%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%bedb2%e8%87%aa%e5%8b%95%e5%a2%9e%e9%95%b7%e4%b8%bb%e9%8d%b5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174933\/","title":{"rendered":"\u5982\u4f55\u8f15\u9b06\u5be6\u73feDB2\u81ea\u52d5\u589e\u9577\u4e3b\u9375\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%bedb2%e8%87%aa%e5%8b%95%e5%a2%9e%e9%95%b7%e4%b8%bb%e9%8d%b5%ef%bc%9f-lxKbjJQVpL\">\u5982\u4f55\u8f15\u9b06\u5be6\u73feDB2\u81ea\u52d5\u589e\u9577\u4e3b\u9375\uff1f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002DB2\u4f5c\u70baIBM\u7684\u4e00\u6b3e\u95dc\u806f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728DB2\u4e2d\u8f15\u9b06\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u7684\u904e\u7a0b\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e8%87%aa%e5%8b%95%e5%a2%9e%e9%95%b7%e4%b8%bb%e9%8d%b5%e7%9a%84%e6%a6%82%e5%bf%b5-lxKbjJQVpL\">\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u7684\u6982\u5ff5<\/h2>\n<p>\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u662f\u6307\u5728\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c\u8cc7\u6599\u5eab\u81ea\u52d5\u751f\u6210\u4e00\u500b\u552f\u4e00\u7684\u4e3b\u9375\u503c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u624b\u52d5\u7ba1\u7406\u4e3b\u9375\u7684\u9ebb\u7169\uff0c\u4e26\u78ba\u4fdd\u6bcf\u689d\u8a18\u9304\u90fd\u6709\u552f\u4e00\u7684\u6a19\u8b58\u3002DB2\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\u4f5c\u70ba\u4e3b\u9375\uff0c\u5176\u4e2d\u6574\u6578\u985e\u578b\u6700\u70ba\u5e38\u898b\u3002<\/p>\n<h2 id=\"%e5%9c%a8db2%e4%b8%ad%e5%af%a6%e7%8f%be%e8%87%aa%e5%8b%95%e5%a2%9e%e9%95%b7%e4%b8%bb%e9%8d%b5-lxKbjJQVpL\">\u5728DB2\u4e2d\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u5e8f\u5217\uff08SEQUENCE\uff09\u4f86\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u3002\u5e8f\u5217\u662f\u4e00\u7a2e\u8cc7\u6599\u5eab\u5c0d\u8c61\uff0c\u7528\u65bc\u751f\u6210\u552f\u4e00\u7684\u6578\u5b57\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f1%ef%bc%9a%e5%89%b5%e5%bb%ba%e5%ba%8f%e5%88%97-lxKbjJQVpL\">\u6b65\u9a5f1\uff1a\u5275\u5efa\u5e8f\u5217<\/h3>\n<pre><code>CREATE SEQUENCE my_sequence\n    START WITH 1\n    INCREMENT BY 1\n    NO CYCLE;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>my_sequence<\/code> \u7684\u5e8f\u5217\uff0c\u5f9e1\u958b\u59cb\uff0c\u6bcf\u6b21\u589e\u95771\uff0c\u4e26\u4e14\u4e0d\u6703\u5faa\u74b0\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f2%ef%bc%9a%e5%89%b5%e5%bb%ba%e8%a1%a8%e4%b8%a6%e4%bd%bf%e7%94%a8%e5%ba%8f%e5%88%97%e4%bd%9c%e7%82%ba%e4%b8%bb%e9%8d%b5-lxKbjJQVpL\">\u6b65\u9a5f2\uff1a\u5275\u5efa\u8868\u4e26\u4f7f\u7528\u5e8f\u5217\u4f5c\u70ba\u4e3b\u9375<\/h3>\n<pre><code>CREATE TABLE my_table (\n    id INT NOT NULL PRIMARY KEY,\n    name VARCHAR(100)\n);<\/code><\/pre>\n<p>\u63a5\u4e0b\u4f86\uff0c\u5275\u5efa\u4e00\u500b\u8868 <code>my_table<\/code>\uff0c\u5176\u4e2d <code>id<\/code> \u6b04\u4f4d\u5c07\u4f5c\u70ba\u4e3b\u9375\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f3%ef%bc%9a%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%e6%99%82%e4%bd%bf%e7%94%a8%e5%ba%8f%e5%88%97-lxKbjJQVpL\">\u6b65\u9a5f3\uff1a\u63d2\u5165\u6578\u64da\u6642\u4f7f\u7528\u5e8f\u5217<\/h3>\n<p>\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>NEXT VALUE FOR<\/code> \u8a9e\u53e5\u4f86\u7372\u53d6\u5e8f\u5217\u7684\u4e0b\u4e00\u500b\u503c\uff0c\u4e26\u5c07\u5176\u4f5c\u70ba\u4e3b\u9375\u503c\u3002<\/p>\n<pre><code>INSERT INTO my_table (id, name)\nVALUES (NEXT VALUE FOR my_sequence, 'Alice');<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6bcf\u6b21\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c<code>id<\/code> \u6b04\u4f4d\u90fd\u6703\u81ea\u52d5\u7372\u53d6\u4e00\u500b\u552f\u4e00\u7684\u503c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e8%87%aa%e5%8b%95%e5%a1%ab%e5%85%85%e4%b8%bb%e9%8d%b5-lxKbjJQVpL\">\u4f7f\u7528\u89f8\u767c\u5668\u81ea\u52d5\u586b\u5145\u4e3b\u9375<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528\u5e8f\u5217\u5916\uff0cDB2\u9084\u652f\u6301\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u81ea\u52d5\u586b\u5145\u4e3b\u9375\u3002\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u7a0b\u5e8f\uff0c\u7576\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002<\/p>\n<h3 id=\"%e5%89%b5%e5%bb%ba%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e7%af%84%e4%be%8b-lxKbjJQVpL\">\u5275\u5efa\u89f8\u767c\u5668\u7684\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TRIGGER my_trigger\nBEFORE INSERT ON my_table\nFOR EACH ROW\nBEGIN\n    SET NEW.id = NEXT VALUE FOR my_sequence;\nEND;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u5275\u5efa\u4e86\u4e00\u500b\u89f8\u767c\u5668 <code>my_trigger<\/code>\uff0c\u5728\u6bcf\u6b21\u63d2\u5165\u65b0\u8a18\u9304\u4e4b\u524d\uff0c\u81ea\u52d5\u5c07 <code>id<\/code> \u6b04\u4f4d\u8a2d\u7f6e\u70ba\u5e8f\u5217\u7684\u4e0b\u4e00\u500b\u503c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-lxKbjJQVpL\">\u7e3d\u7d50<\/h2>\n<p>\u5728DB2\u4e2d\u5be6\u73fe\u81ea\u52d5\u589e\u9577\u4e3b\u9375\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u5169\u7a2e\uff1a\u4f7f\u7528\u5e8f\u5217\u548c\u4f7f\u7528\u89f8\u767c\u5668\u3002\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u7c21\u5316\u4e86\u4e3b\u9375\u7684\u7ba1\u7406\uff0c\u9084\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u552f\u4e00\u6027\u548c\u5b8c\u6574\u6027\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u7cfb\u7d71\uff0c\u9019\u4e9b\u6280\u8853\u90fd\u80fd\u6709\u6548\u63d0\u5347\u8cc7\u6599\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684DB2\u8cc7\u6599\u5eab\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u8f15\u9b06\u5be6\u73feDB2\u81ea\u52d5\u589e\u9577\u4e3b\u9375\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u63d2\u5165\u904e\u7a0b\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-174933","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174933","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=174933"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174933\/revisions"}],"predecessor-version":[{"id":174934,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174933\/revisions\/174934"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}