{"id":44009,"date":"2024-12-01T10:52:26","date_gmt":"2024-12-01T02:52:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/44009\/"},"modified":"2024-12-01T10:52:26","modified_gmt":"2024-12-01T02:52:26","slug":"%e4%bd%bf%e7%94%a8oracle-lpad%e5%87%bd%e6%95%b0%e5%9c%a8%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%b7%a6%e4%be%a7%e5%a1%ab%e5%85%85%e5%ad%97%e7%ac%a6%e7%9a%84%e6%a1%88%e4%be%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/44009\/","title":{"rendered":"\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b<\/h1>\n<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n<p>\u6807\u9898\uff1aOracle LPAD\u51fd\u6570\u793a\u4f8b\uff1a\u5982\u4f55\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u5b57\u7b26<\/p>\n<p>Oracle\u6570\u636e\u5e93\u4e2d\u7684LPAD\u51fd\u6570\u662f\u4e00\u79cd\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u5b57\u7b26\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\u5904\u7406\u3002LPAD\u51fd\u6570\u7684\u8bed\u6cd5\u4e3a\uff1aLPAD(\u8981\u586b\u5145\u7684\u5b57\u7b26\u4e32,\u603b\u957f\u5ea6,\u586b\u5145\u5b57\u7b26)\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793a\u5982\u4f55\u5728Oracle\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u793a\u4f8b\u8868test_table\uff0c\u7528\u4e8e\u6f14\u793aLPAD\u51fd\u6570\u7684\u4f7f\u7528\uff1a<\/p>\n<pre>CREATE TABLE test_table (\n    id NUMBER,\n    name VARCHAR2(50)\n);\n\nINSERT INTO test_table VALUES (1, 'Tom');\nINSERT INTO test_table VALUES (2, 'Jerry');\nINSERT INTO test_table VALUES (3, 'Alice');<\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528LPAD\u51fd\u6570\u5bf9name\u5b57\u6bb5\u8fdb\u884c\u5de6\u4fa7\u586b\u5145\uff0c\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4e32\u586b\u5145\u4e3a10\u4e2a\u5b57\u7b26\uff0c\u586b\u5145\u5b57\u7b26\u4e3a&#8221;*&#8221;\uff0c\u5e76\u5c06\u7ed3\u679c\u4f5c\u4e3a\u65b0\u7684\u5217\u663e\u793a\u51fa\u6765\uff1a<\/p>\n<pre>SELECT id, name, LPAD(name, 10, '*') AS padded_name\nFROM test_table;<\/pre>\n<p>\u6267\u884c\u4ee5\u4e0aSQL\u8bed\u53e5\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u5982\u4e0b\u7ed3\u679c\uff1a<\/p>\n<pre>ID  NAME    PADDED_NAME\n1   Tom     *******Tom\n2   Jerry   *****Jerry\n3   Alice   *****Alice<\/pre>\n<p>\u4ece\u4ee5\u4e0a\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0cLPAD\u51fd\u6570\u6210\u529f\u5730\u5c06\u539f\u59cb\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u4e3a\u6307\u5b9a\u957f\u5ea6\uff0c\u5e76\u4f7f\u7528\u6307\u5b9a\u5b57\u7b26\u8fdb\u884c\u586b\u5145\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u8f93\u51fa\u3001\u6bd4\u8f83\u6216\u8005\u5176\u4ed6\u64cd\u4f5c\u65f6\uff0c\u66f4\u65b9\u4fbf\u5730\u5bf9\u5176\u683c\u5f0f\u8fdb\u884c\u63a7\u5236\u3002<\/p>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u672c\u6587\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5728Oracle\u6570\u636e\u5e93\u4e2d\u5982\u4f55\u4f7f\u7528LPAD\u51fd\u6570\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5de6\u4fa7\u586b\u5145\u64cd\u4f5c\u3002LPAD\u51fd\u6570\u662fOracle\u6570\u636e\u5e93\u4e2d\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u5904\u7406\u51fd\u6570\u4e4b\u4e00\uff0c\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\u5904\u7406\uff0c\u63d0\u9ad8\u6570\u636e\u5c55\u793a\u7684\u7f8e\u89c2\u6027\u548c\u53ef\u8bfb\u6027\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u8bfb\u8005\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u4f7f\u7528Oracle\u6570\u636e\u5e93\u65f6\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8eOracle,\u5b57\u7b26\u4e32,LPAD\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b \u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u4f7f\u7528Oracle LPAD\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u5b57\u7b26\u7684\u6848\u4f8b\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01 \u6807\u9898\uff1aOracle LPAD\u51fd\u6570\u793a\u4f8b\uff1a\u5982\u4f55\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u5b57\u7b26 Oracle\u6570\u636e\u5e93\u4e2d\u7684LPAD\u51fd\u6570\u662f\u4e00\u79cd\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u6307\u5b9a\u5b57\u7b26\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\u5904\u7406\u3002LPAD\u51fd\u6570\u7684\u8bed\u6cd5\u4e3a\uff1aLPAD(\u8981\u586b\u5145\u7684\u5b57\u7b26\u4e32,\u603b\u957f\u5ea6,\u586b\u5145\u5b57\u7b26)\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793a\u5982\u4f55\u5728Oracle\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u3002 \u9996\u5148\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u793a\u4f8b\u8868test_table\uff0c\u7528\u4e8e\u6f14\u793aLPAD\u51fd\u6570\u7684\u4f7f\u7528\uff1a CREATE TABLE test_table ( id NUMBER, name VARCHAR2(50) ); INSERT INTO test_table VALUES (1, &#8216;Tom&#8217;); INSERT INTO test_table VALUES (2, &#8216;Jerry&#8217;); INSERT INTO test_table VALUES (3, &#8216;Alice&#8217;); \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528LPAD\u51fd\u6570\u5bf9name\u5b57\u6bb5\u8fdb\u884c\u5de6\u4fa7\u586b\u5145\uff0c\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4e32\u586b\u5145\u4e3a10\u4e2a\u5b57\u7b26\uff0c\u586b\u5145\u5b57\u7b26\u4e3a&#8221;*&#8221;\uff0c\u5e76\u5c06\u7ed3\u679c\u4f5c\u4e3a\u65b0\u7684\u5217\u663e\u793a\u51fa\u6765\uff1a SELECT id, name, LPAD(name, 10, &#8216;*&#8217;) AS padded_name FROM test_table; \u6267\u884c\u4ee5\u4e0aSQL\u8bed\u53e5\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u5982\u4e0b\u7ed3\u679c\uff1a ID NAME PADDED_NAME 1 Tom *******Tom 2 Jerry [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-44009","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/44009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=44009"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/44009\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=44009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=44009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=44009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}