{"id":199900,"date":"2025-05-06T10:11:31","date_gmt":"2025-05-06T02:11:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199900\/"},"modified":"2025-05-06T10:11:31","modified_gmt":"2025-05-06T02:11:31","slug":"%e5%ad%a6%e4%bc%9a%e4%bd%bf%e7%94%a8oracle-lpad%e5%87%bd%e6%95%b0%e8%bf%9b%e8%a1%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%a1%ab%e5%85%85%ef%bc%9a%e9%ab%98%e6%95%88%e5%a4%84%e7%90%86%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199900\/","title":{"rendered":"\u5b66\u4f1a\u4f7f\u7528Oracle LPAD\u51fd\u6570\u8fdb\u884c\u5b57\u7b26\u4e32\u586b\u5145\uff1a\u9ad8\u6548\u5904\u7406\u5b57\u7b26\u4e32\u957f\u5ea6"},"content":{"rendered":"

<\/b> <\/p>\n

\u5b66\u4f1a\u4f7f\u7528Oracle LPAD\u51fd\u6570\u8fdb\u884c\u5b57\u7b26\u4e32\u586b\u5145\uff1a\u9ad8\u6548\u5904\u7406\u5b57\u7b26\u4e32\u957f\u5ea6<\/h1>\n<\/p>\n

Oracle\u6570\u636e\u5e93\u4e2d\u7684LPAD\u51fd\u6570\u662f\u7528\u6765\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u5b57\u7b26\u4f7f\u5b57\u7b26\u4e32\u8fbe\u5230\u6307\u5b9a\u7684\u957f\u5ea6\uff0c\u4ece\u800c\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u529f\u80fd\u3002\u5728\u65e5\u5e38\u7684\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u586b\u5145\u7684\u60c5\u51b5\uff0cLPAD\u51fd\u6570\u5c31\u53ef\u4ee5\u5f88\u597d\u5730\u5e94\u5bf9\u8fd9\u79cd\u9700\u6c42\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdOracle LPAD\u51fd\u6570\u7684\u7528\u6cd5\uff0c\u5305\u62ec\u51fd\u6570\u8bed\u6cd5\u3001\u53c2\u6570\u542b\u4e49\u4ee5\u53ca\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u638c\u63e1\u5b57\u7b26\u4e32\u586b\u5145\u7684\u9ad8\u6548\u65b9\u5f0f\u3002<\/p>\n

1. LPAD\u51fd\u6570\u7684\u8bed\u6cd5<\/h3>\n

Oracle\u7684LPAD\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

LPAD(string, length, fill_string)<\/pre>\n
\u5176\u4e2d\uff0c\u53c2\u6570\u542b\u4e49\u5982\u4e0b\uff1a<\/p>\n
    \n
  • string<\/code>\uff1a\u8981\u8fdb\u884c\u586b\u5145\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n
  • length<\/code>\uff1a\u586b\u5145\u540e\u7684\u5b57\u7b26\u4e32\u603b\u957f\u5ea6\u3002<\/li>\n
  • fill_string<\/code>\uff1a\u586b\u5145\u7684\u5b57\u7b26\uff0c\u53ef\u4ee5\u662f\u4efb\u610f\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n
    2. LPAD\u51fd\u6570\u4f7f\u7528\u793a\u4f8b<\/h3>\n
    \u63a5\u4e0b\u6765\u6211\u4eec\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aLPAD\u51fd\u6570\u7684\u4f7f\u7528\u3002<\/p>\n
    \u5047\u8bbe\u6709\u4e00\u4e2a\u8868employees<\/code>\uff0c\u5305\u542b\u5458\u5de5\u7684\u59d3\u540d\u548c\u5de5\u53f7\uff0c\u6211\u4eec\u60f3\u8981\u5c06\u5de5\u53f7\u586b\u5145\u5230\u6307\u5b9a\u7684\u957f\u5ea6\uff0c\u4e0d\u8db3\u90e8\u5206\u75280\u8fdb\u884c\u586b\u5145\u3002<\/p>\n
    \u9996\u5148\u521b\u5efaemployees<\/code>\u8868\u5e76\u63d2\u5165\u6570\u636e\uff1a<\/p>\n
    CREATE TABLE employees (\n    name VARCHAR2(50),\n    emp_id VARCHAR2(10)\n);\n\nINSERT INTO employees (name, emp_id) VALUES ('\u5f20\u4e09', '001');\nINSERT INTO employees (name, emp_id) VALUES ('\u674e\u56db', '12');\nINSERT INTO employees (name, emp_id) VALUES ('\u738b\u4e94', '345');<\/pre>\n
    \u7136\u540e\u4f7f\u7528LPAD\u51fd\u6570\u5bf9emp_id<\/code>\u8fdb\u884c\u586b\u5145\uff1a<\/p>\n
    SELECT name, LPAD(emp_id, 5, '0') AS new_emp_id\nFROM employees;<\/pre>\n
    \u4ee5\u4e0a\u4ee3\u7801\u5c06\u4f1a\u8f93\u51fa\u4ee5\u4e0b\u7ed3\u679c\uff1a<\/p>\n
    |   name   | new_emp_id |\n|----------|------------|\n|   \u5f20\u4e09   |   00001    |\n|   \u674e\u56db   |   00012    |\n|   \u738b\u4e94   |   00345    |<\/pre>\n
    \u4ece\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\u53ef\u4ee5\u770b\u51fa\uff0cLPAD\u51fd\u6570\u6210\u529f\u5730\u5c06emp_id<\/code>\u586b\u5145\u5230\u4e86\u6307\u5b9a\u7684\u957f\u5ea6\uff0c\u5e76\u901a\u8fc7\u586b\u5145\u5b57\u7b260<\/code>\u5b9e\u73b0\u4e86\u5bf9\u9f50\u6548\u679c\u3002<\/p>\n
    3. \u5c0f\u7ed3<\/h3>\n
    \u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u8bfb\u8005\u53ef\u4ee5\u4e86\u89e3\u5230Oracle\u4e2dLPAD\u51fd\u6570\u7684\u7528\u6cd5\u53ca\u8bed\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u5728\u5b9e\u9645\u7684\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\u5e94\u7528LPAD\u51fd\u6570\u8fdb\u884c\u5b57\u7b26\u4e32\u586b\u5145\u3002\u638c\u63e1LPAD\u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u63d0\u9ad8\u6570\u636e\u5e93\u67e5\u8be2\u7684\u6548\u7387\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u4f7f\u5f97\u8f93\u51fa\u7ed3\u679c\u66f4\u5177\u6709\u53ef\u8bfb\u6027\u548c\u7f8e\u89c2\u6027\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u8bfb\u8005\u5728\u6570\u636e\u5e93\u5f00\u53d1\u548c\u6570\u636e\u5904\u7406\u4e2d\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
    \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n
    \n
    \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u5b66\u4f1a\u4f7f\u7528Oracle LPAD\u51fd...<\/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-199900","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199900","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=199900"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199900\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}