{"id":199935,"date":"2025-05-06T11:05:01","date_gmt":"2025-05-06T03:05:01","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199935\/"},"modified":"2025-05-06T11:05:01","modified_gmt":"2025-05-06T03:05:01","slug":"oracle-lpad%e5%87%bd%e6%95%b0%e8%af%a6%e8%a7%a3%ef%bc%9a%e5%ae%9e%e7%8e%b0%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%af%b9%e9%bd%90%e7%9a%84%e6%9c%89%e6%95%88%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199935\/","title":{"rendered":"Oracle LPAD\u51fd\u6570\u8be6\u89e3\uff1a\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u6709\u6548\u6280\u5de7"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Oracle LPAD\u51fd\u6570\u8be6\u89e3\uff1a\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u6709\u6548\u6280\u5de7<\/h1>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b\u7b49\u7b49\u77e5\u8bc6\u70b9&#8230;\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n<p>Oracle\u662f\u4e00\u6b3e\u5f3a\u5927\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u5185\u7f6e\u4e86\u8bb8\u591a\u65b9\u4fbf\u5b9e\u7528\u7684\u51fd\u6570\uff0cLPAD\u51fd\u6570\u5c31\u662f\u5176\u4e2d\u4e4b\u4e00\u3002LPAD\u51fd\u6570\u4e3b\u8981\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u7684\u5de6\u4fa7\u586b\u5145\u7279\u5b9a\u7684\u5b57\u7b26\uff0c\u4ece\u800c\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u5bf9\u9f50\u3002\u5728\u5b9e\u9645\u7684\u6570\u636e\u5904\u7406\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\uff0cLPAD\u51fd\u6570\u7684\u4f7f\u7528\u53ef\u4ee5\u8ba9\u8fd9\u4e00\u8fc7\u7a0b\u53d8\u5f97\u66f4\u52a0\u9ad8\u6548\u548c\u65b9\u4fbf\u3002\u672c\u6587\u5c06\u6df1\u5165\u89e3\u6790Oracle\u4e2dLPAD\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u4ee5\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u3002<\/p>\n<h3>\u4e00\u3001LPAD\u51fd\u6570\u6982\u8ff0<\/h3>\n<p>LPAD\u51fd\u6570\u662fOracle\u6570\u636e\u5e93\u4e2d\u7684\u4e00\u4e2a\u5b57\u7b26\u4e32\u51fd\u6570\uff0c\u5176\u529f\u80fd\u662f\u5728\u539f\u5b57\u7b26\u4e32\u7684\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u7684\u5b57\u7b26\uff0c\u76f4\u5230\u539f\u5b57\u7b26\u4e32\u8fbe\u5230\u6307\u5b9a\u7684\u957f\u5ea6\u3002LPAD\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>LPAD(\u539f\u5b57\u7b26\u4e32, \u9700\u8981\u586b\u5145\u7684\u957f\u5ea6, \u586b\u5145\u7684\u5b57\u7b26\u4e32)<\/pre>\n<p>\u5728LPAD\u51fd\u6570\u4e2d\uff0c\u539f\u5b57\u7b26\u4e32\u662f\u9700\u8981\u8fdb\u884c\u586b\u5145\u7684\u5b57\u7b26\u4e32\uff0c\u9700\u8981\u586b\u5145\u7684\u957f\u5ea6\u662f\u6700\u7ec8\u5e0c\u671b\u5f97\u5230\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u586b\u5145\u7684\u5b57\u7b26\u4e32\u5219\u662f\u7528\u4e8e\u586b\u5145\u7684\u5b57\u7b26\u3002<\/p>\n<h3>\u4e8c\u3001LPAD\u51fd\u6570\u7684\u4f7f\u7528\u793a\u4f8b<\/h3>\n<p>\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3LPAD\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4e0b\u9762\u5c06\u7ed9\u51fa\u51e0\u4e2a\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<h4>1. \u5bf9\u9f50\u6570\u5b57<\/h4>\n<p>\u5047\u8bbe\u6709\u4e00\u4e2a\u6570\u5b57\u5217\uff0c\u8981\u6c42\u5c06\u6240\u6709\u6570\u5b57\u5de6\u5bf9\u9f50\uff0c\u5e76\u75280\u586b\u5145\u52305\u4f4d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8bed\u53e5\u5b9e\u73b0\uff1a<\/p>\n<pre>SELECT LPAD(num_column, 5, '0') AS aligned_num\n  FROM table_name;<\/pre>\n<p>\u5176\u4e2d\uff0cnum_column\u662f\u539f\u6570\u5b57\u5217\u7684\u5b57\u6bb5\uff0ctable_name\u662f\u9700\u8981\u64cd\u4f5c\u7684\u8868\u540d\u3002<\/p>\n<h4>2. \u5bf9\u9f50\u65e5\u671f<\/h4>\n<p>\u53e6\u5916\u4e00\u4e2a\u5e38\u89c1\u7684\u573a\u666f\u662f\u5bf9\u65e5\u671f\u8fdb\u884c\u5bf9\u9f50\u64cd\u4f5c\uff0c\u540c\u6837\u53ef\u4ee5\u4f7f\u7528LPAD\u51fd\u6570\u6765\u5b9e\u73b0\uff1a<\/p>\n<pre>SELECT LPAD(TO_CHAR(date_column, 'YYYYMMDD'), 10, ' ') AS aligned_date\n  FROM table_name;<\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5c06\u65e5\u671f\u5217date_column\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\uff0c\u5e76\u4e14\u4fdd\u8bc1\u5176\u957f\u5ea6\u4e3a10\u4f4d\uff0c\u4e0d\u591f\u7684\u90e8\u5206\u4f7f\u7528\u7a7a\u683c\u586b\u5145\u3002<\/p>\n<h3>\u4e09\u3001LPAD\u51fd\u6570\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>\u5728\u4f7f\u7528LPAD\u51fd\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u7ec6\u8282\u95ee\u9898\uff0c\u4ee5\u907f\u514d\u51fa\u73b0\u610f\u5916\u7684\u9519\u8bef\uff1a<\/p>\n<ol>\n<li>LPAD\u51fd\u6570\u4ec5\u5bf9\u53f3\u4fa7\u586b\u5145\u5b57\u7b26\uff0c\u5982\u679c\u9700\u8981\u5728\u5de6\u4fa7\u548c\u53f3\u4fa7\u90fd\u586b\u5145\u5b57\u7b26\uff0c\u53ef\u4ee5\u7ed3\u5408\u4f7f\u7528LPAD\u548cRPAD\u51fd\u6570\u3002<\/li>\n<li>\u586b\u5145\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u8d85\u8fc7\u9700\u8981\u586b\u5145\u7684\u957f\u5ea6\u65f6\uff0cOracle\u4f1a\u81ea\u52a8\u622a\u53d6\u586b\u5145\u7684\u5b57\u7b26\u4e32\uff0c\u4e0d\u4f1a\u51fa\u73b0\u9519\u8bef\u3002<\/li>\n<li>LPAD\u51fd\u6570\u53ea\u5bf9\u5b57\u7b26\u5b57\u6bb5\u6709\u6548\uff0c\u5982\u679c\u9700\u8981\u5bf9\u6570\u5b57\u5b57\u6bb5\u8fdb\u884c\u586b\u5145\uff0c\u9700\u8981\u5148\u5c06\u5176\u8f6c\u6362\u6210\u5b57\u7b26\u578b\u3002<\/li>\n<\/ol>\n<h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<p>\u672c\u6587\u5bf9Oracle\u4e2dLPAD\u51fd\u6570\u7684\u7528\u6cd5\u8fdb\u884c\u4e86\u8be6\u7ec6\u89e3\u6790\uff0c\u901a\u8fc7\u5b9e\u9645\u7684\u4ee3\u7801\u793a\u4f8b\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3LPAD\u51fd\u6570\u7684\u4f5c\u7528\u548c\u7528\u6cd5\u3002\u5728\u5b9e\u9645\u7684\u6570\u636e\u5904\u7406\u4e2d\uff0cLPAD\u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u5bf9\u9f50\uff0c\u63d0\u9ad8\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u548c\u51c6\u786e\u6027\u3002\u5e0c\u671b\u8bfb\u8005\u53ef\u4ee5\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u66f4\u52a0\u6df1\u5165\u5730\u4e86\u89e3\u548c\u638c\u63e1LPAD\u51fd\u6570\u7684\u7528\u6cd5\uff0c\u4ece\u800c\u5728\u5b9e\u9645\u7684\u6570\u636e\u5904\u7406\u4e2d\u8fd0\u7528\u81ea\u5982\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aOracle LPAD\u51fd\u6570\u8be6\u89e3\uff1a\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u6709\u6548\u6280\u5de7\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>Oracle LPAD\u51fd\u6570\u8be6\u89e3\uff1a&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199935","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199935","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199935"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199935\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}