{"id":94254,"date":"2024-10-19T18:46:18","date_gmt":"2024-10-19T10:46:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94254\/"},"modified":"2024-10-19T18:46:18","modified_gmt":"2024-10-19T10:46:18","slug":"oracle-sequence%e5%ba%8f%e5%88%97%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94254\/","title":{"rendered":"Oracle sequence\u5e8f\u5217\u7684\u6b63\u78ba\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"oracle-sequence%e5%ba%8f%e5%88%97%e7%9a%84%e6%ad%a3%e7%a2%ba%e7%94%a8%e6%b3%95-zWceoUpUZW\">Oracle Sequence\u5e8f\u5217\u7684\u6b63\u78ba\u7528\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5e8f\u5217\uff08Sequence\uff09\u662f\u4e00\u7a2e\u975e\u5e38\u91cd\u8981\u7684\u7269\u4ef6\uff0c\u7279\u5225\u662f\u5728Oracle\u8cc7\u6599\u5eab\u4e2d\u3002\u5e8f\u5217\u7684\u4e3b\u8981\u529f\u80fd\u662f\u751f\u6210\u552f\u4e00\u7684\u6578\u5b57\uff0c\u901a\u5e38\u7528\u65bc\u4e3b\u9375\u7684\u81ea\u52d5\u589e\u91cf\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u5e8f\u5217\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u5305\u62ec\u5176\u5275\u5efa\u3001\u4f7f\u7528\u53ca\u7ba1\u7406\u7b49\u65b9\u9762\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%aforacle%e5%ba%8f%e5%88%97%ef%bc%9f-zWceoUpUZW\">\u4ec0\u9ebc\u662fOracle\u5e8f\u5217\uff1f<\/h2>\n<p>Oracle\u5e8f\u5217\u662f\u4e00\u7a2e\u6578\u64da\u5eab\u5c0d\u8c61\uff0c\u7528\u65bc\u751f\u6210\u552f\u4e00\u7684\u6574\u6578\u503c\u3002\u9019\u4e9b\u503c\u901a\u5e38\u7528\u65bc\u8868\u7684\u4e3b\u9375\uff0c\u78ba\u4fdd\u6bcf\u4e00\u884c\u6578\u64da\u90fd\u6709\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u3002\u5e8f\u5217\u7684\u751f\u6210\u662f\u57fa\u65bc\u4e00\u500b\u5b9a\u7fa9\u7684\u589e\u91cf\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u975e\u5e38\u6709\u6548\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e5%ba%8f%e5%88%97-zWceoUpUZW\">\u5275\u5efa\u5e8f\u5217<\/h2>\n<p>\u8981\u5275\u5efa\u4e00\u500b\u5e8f\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE SEQUENCE sequence_name\n  START WITH initial_value\n  INCREMENT BY increment_value\n  [MINVALUE min_value]\n  [MAXVALUE max_value]\n  [CYCLE | NOCYCLE]\n  [CACHE cache_size];<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5177\u9ad4\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre><code>CREATE SEQUENCE user_id_seq\n  START WITH 1\n  INCREMENT BY 1\n  MINVALUE 1\n  NOCYCLE\n  CACHE 10;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>user_id_seq<\/code> \u7684\u5e8f\u5217\uff0c\u5f9e1\u958b\u59cb\uff0c\u6bcf\u6b21\u589e\u52a01\uff0c\u4e26\u4e14\u4e0d\u6703\u5faa\u74b0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%ba%8f%e5%88%97-zWceoUpUZW\">\u4f7f\u7528\u5e8f\u5217<\/h2>\n<p>\u4f7f\u7528\u5e8f\u5217\u751f\u6210\u6578\u5b57\u975e\u5e38\u7c21\u55ae\u3002\u53ef\u4ee5\u4f7f\u7528 <code>NEXTVAL<\/code> \u548c <code>CURRVAL<\/code> \u4f86\u7372\u53d6\u5e8f\u5217\u7684\u4e0b\u4e00\u500b\u503c\u548c\u7576\u524d\u503c\u3002<\/p>\n<ul>\n<li><code>NEXTVAL<\/code>\uff1a\u8fd4\u56de\u5e8f\u5217\u7684\u4e0b\u4e00\u500b\u503c\u4e26\u81ea\u52d5\u589e\u52a0\u5e8f\u5217\u7684\u8a08\u6578\u3002<\/li>\n<li><code>CURRVAL<\/code>\uff1a\u8fd4\u56de\u5e8f\u5217\u7684\u7576\u524d\u503c\uff0c\u4f46\u5fc5\u9808\u5728\u540c\u4e00\u6703\u8a71\u4e2d\u5148\u8abf\u7528\u904e <code>NEXTVAL<\/code>\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u5e8f\u5217\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre><code>INSERT INTO users (id, name) \nVALUES (user_id_seq.NEXTVAL, 'John Doe');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u4f7f\u7528\u5e8f\u5217\u751f\u6210\u7684\u552f\u4e00ID\u63d2\u5165\u5230 <code>users<\/code> \u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e7%ae%a1%e7%90%86%e5%ba%8f%e5%88%97-zWceoUpUZW\">\u7ba1\u7406\u5e8f\u5217<\/h2>\n<p>\u5e8f\u5217\u7684\u7ba1\u7406\u540c\u6a23\u91cd\u8981\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u4fee\u6539\u6216\u522a\u9664\u5e8f\u5217\uff1a<\/p>\n<ul>\n<li>\u4fee\u6539\u5e8f\u5217\uff1a<code>ALTER SEQUENCE sequence_name [options];<\/code><\/li>\n<li>\u522a\u9664\u5e8f\u5217\uff1a<code>DROP SEQUENCE sequence_name;<\/code><\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u5e8f\u5217\u7684\u589e\u91cf\u6539\u70ba2\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER SEQUENCE user_id_seq\n  INCREMENT BY 2;<\/code><\/pre>\n<h2 id=\"%e5%ba%8f%e5%88%97%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-zWceoUpUZW\">\u5e8f\u5217\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528Oracle\u5e8f\u5217\u6642\uff0c\u6709\u5e7e\u500b\u6700\u4f73\u5be6\u8e10\u9700\u8981\u9075\u5faa\uff1a<\/p>\n<ul>\n<li>\u907f\u514d\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u4f7f\u7528 <code>CURRVAL<\/code>\uff0c\u56e0\u70ba\u5b83\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002<\/li>\n<li>\u5408\u7406\u8a2d\u7f6e\u5e8f\u5217\u7684 <code>CACHE<\/code> \u5927\u5c0f\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u5e8f\u5217\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u78ba\u4fdd\u4e0d\u6703\u51fa\u73fe\u91cd\u8907\u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zWceoUpUZW\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u5e8f\u5217\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u751f\u6210\u552f\u4e00\u7684\u6578\u5b57\uff0c\u7279\u5225\u662f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u3002\u901a\u904e\u6b63\u78ba\u7684\u5275\u5efa\u3001\u4f7f\u7528\u548c\u7ba1\u7406\uff0c\u5e8f\u5217\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u8cc7\u6599\u5eab\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002\u82e5\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u642d\u5efa\u60a8\u7684\u8cc7\u6599\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u7684\u7a69\u5b9a\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u5e8f\u5217\u7684\u6b63\u78ba\u7528\u6cd5\uff0c\u638c\u63e1\u81ea\u52d5\u751f\u6210\u552f\u4e00\u6578\u5b57\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\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-94254","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94254","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=94254"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94254\/revisions"}],"predecessor-version":[{"id":94255,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94254\/revisions\/94255"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}