{"id":44057,"date":"2024-12-01T12:44:41","date_gmt":"2024-12-01T04:44:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/44057\/"},"modified":"2024-12-01T12:44:41","modified_gmt":"2024-12-01T04:44:41","slug":"%e5%ad%a6%e4%bc%9a%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8oracle%e7%9a%84lpad%e5%87%bd%e6%95%b0%e6%9d%a5%e5%ae%9e%e7%8e%b0%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%af%b9%e9%bd%90%ef%bc%9a%e8%af%a6%e7%bb%86%e6%bc%94","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/44057\/","title":{"rendered":"\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a"},"content":{"rendered":"

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

\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a<\/h1>\n

IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7c73\u4e91\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300a\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

Oracle\u4e2d\u7684LPAD\u51fd\u6570\u662f\u7528\u6765\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u7279\u5b9a\u5b57\u7b26\uff0c\u4f7f\u5b57\u7b26\u4e32\u8fbe\u5230\u6307\u5b9a\u957f\u5ea6\u7684\u51fd\u6570\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cLPAD\u51fd\u6570\u5e38\u7528\u4e8e\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\u5c55\u793a\u6216\u62a5\u8868\u751f\u6210\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7LPAD\u51fd\u6570\u53ef\u4ee5\u4f7f\u8f93\u51fa\u7ed3\u679c\u66f4\u52a0\u7f8e\u89c2\u548c\u6613\u8bfb\u3002\u672c\u6587\u5c06\u901a\u8fc7\u5177\u4f53\u7684\u793a\u4f8b\u6765\u8bb2\u89e3\u5982\u4f55\u4f7f\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002<\/p>\n

\u793a\u4f8b\u4e00\uff1a\u5728\u67e5\u8be2\u7ed3\u679c\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5546\u54c1\u540d\u79f0\u5bf9\u9f50<\/h3>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5546\u54c1\u8868product\uff0c\u5176\u4e2d\u5305\u542b\u5546\u54c1\u7684\u540d\u79f0\u548c\u4ef7\u683c\u3002\u6211\u4eec\u5e0c\u671b\u901a\u8fc7\u67e5\u8be2\u6765\u5c55\u793a\u5546\u54c1\u7684\u540d\u79f0\uff0c\u5e76\u4e14\u4fdd\u6301\u540d\u79f0\u7684\u5bf9\u9f50\uff0c\u4f7f\u7528LPAD\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

SELECT LPAD(product_name, 20, ' ') AS aligned_product_name, price\nFROM product;<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528LPAD\u51fd\u6570\u5c06\u5546\u54c1\u540d\u79f0\u586b\u5145\u7a7a\u683c\uff0c\u4f7f\u5176\u603b\u957f\u5ea6\u4e3a20\u4e2a\u5b57\u7b26\uff0c\u7136\u540e\u5c06\u5bf9\u9f50\u540e\u7684\u5546\u54c1\u540d\u79f0\u4e0e\u4ef7\u683c\u4e00\u8d77\u5c55\u793a\u3002<\/p>\n
\u793a\u4f8b\u4e8c\uff1a\u5728\u62a5\u8868\u751f\u6210\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u5bf9\u6570\u636e\u8fdb\u884c\u5bf9\u9f50\u5904\u7406<\/h3>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u9500\u552e\u6570\u636e\u8868sales\uff0c\u5176\u4e2d\u5305\u542b\u9500\u552e\u4eba\u5458\u7684\u59d3\u540d\u548c\u9500\u552e\u989d\u3002\u5728\u751f\u6210\u9500\u552e\u62a5\u8868\u65f6\uff0c\u6211\u4eec\u5e0c\u671b\u9500\u552e\u4eba\u5458\u59d3\u540d\u5bf9\u9f50\uff0c\u5e76\u4e14\u5728\u59d3\u540d\u540e\u9762\u6dfb\u52a0\u56fa\u5b9a\u957f\u5ea6\u7684\u5206\u9694\u7b26\uff0c\u4ee5\u4fbf\u4e8e\u7f8e\u5316\u62a5\u8868\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
SELECT LPAD(salesperson_name, 15, ' ') || ' | ' || sales_amount AS formatted_sales_data\nFROM sales;<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528LPAD\u51fd\u6570\u5bf9\u9500\u552e\u4eba\u5458\u59d3\u540d\u8fdb\u884c\u5bf9\u9f50\u5904\u7406\uff0c\u957f\u5ea6\u4e3a15\u4e2a\u5b57\u7b26\uff0c\u7136\u540e\u5728\u59d3\u540d\u540e\u9762\u6dfb\u52a0\u4e00\u4e2a\u56fa\u5b9a\u7684\u5206\u9694\u7b26\u201c | \u201d\uff0c\u6700\u540e\u5c06\u5904\u7406\u540e\u7684\u9500\u552e\u6570\u636e\u5c55\u793a\u5728\u62a5\u8868\u4e2d\u3002<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u4e24\u4e2a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230LPAD\u51fd\u6570\u5728\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u65f6\u7684\u7075\u6d3b\u6027\u548c\u5b9e\u7528\u6027\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u60c5\u51b5\u6765\u7075\u6d3b\u8fd0\u7528LPAD\u51fd\u6570\uff0c\u4f7f\u8f93\u51fa\u7ed3\u679c\u66f4\u52a0\u7f8e\u89c2\u548c\u6613\u8bfb\u3002<\/p>\n
\u603b\u7ed3<\/h3>\n
\u672c\u6587\u901a\u8fc7\u4e24\u4e2a\u5177\u4f53\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528Oracle\u4e2d\u7684LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002\u901a\u8fc7\u5bf9LPAD\u51fd\u6570\u7684\u7075\u6d3b\u8fd0\u7528\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u9700\u6c42\uff0c\u4e3a\u6570\u636e\u5c55\u793a\u548c\u62a5\u8868\u751f\u6210\u63d0\u4f9b\u66f4\u597d\u7684\u6548\u679c\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3LPAD\u51fd\u6570\u7684\u7528\u6cd5\uff0c\u5e76\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u7075\u6d3b\u8fd0\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eOracle,\u5b57\u7b26\u4e32,LPAD\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7c73\u4e91\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300a\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01 Oracle\u4e2d\u7684LPAD\u51fd\u6570\u662f\u7528\u6765\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7\u586b\u5145\u7279\u5b9a\u5b57\u7b26\uff0c\u4f7f\u5b57\u7b26\u4e32\u8fbe\u5230\u6307\u5b9a\u957f\u5ea6\u7684\u51fd\u6570\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cLPAD\u51fd\u6570\u5e38\u7528\u4e8e\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\u5c55\u793a\u6216\u62a5\u8868\u751f\u6210\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7LPAD\u51fd\u6570\u53ef\u4ee5\u4f7f\u8f93\u51fa\u7ed3\u679c\u66f4\u52a0\u7f8e\u89c2\u548c\u6613\u8bfb\u3002\u672c\u6587\u5c06\u901a\u8fc7\u5177\u4f53\u7684\u793a\u4f8b\u6765\u8bb2\u89e3\u5982\u4f55\u4f7f\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002 \u793a\u4f8b\u4e00\uff1a\u5728\u67e5\u8be2\u7ed3\u679c\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5546\u54c1\u540d\u79f0\u5bf9\u9f50 \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5546\u54c1\u8868product\uff0c\u5176\u4e2d\u5305\u542b\u5546\u54c1\u7684\u540d\u79f0\u548c\u4ef7\u683c\u3002\u6211\u4eec\u5e0c\u671b\u901a\u8fc7\u67e5\u8be2\u6765\u5c55\u793a\u5546\u54c1\u7684\u540d\u79f0\uff0c\u5e76\u4e14\u4fdd\u6301\u540d\u79f0\u7684\u5bf9\u9f50\uff0c\u4f7f\u7528LPAD\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a SELECT LPAD(product_name, 20, ‘ ‘) AS aligned_product_name, price FROM product; \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528LPAD\u51fd\u6570\u5c06\u5546\u54c1\u540d\u79f0\u586b\u5145\u7a7a\u683c\uff0c\u4f7f\u5176\u603b\u957f\u5ea6\u4e3a20\u4e2a\u5b57\u7b26\uff0c\u7136\u540e\u5c06\u5bf9\u9f50\u540e\u7684\u5546\u54c1\u540d\u79f0\u4e0e\u4ef7\u683c\u4e00\u8d77\u5c55\u793a\u3002 \u793a\u4f8b\u4e8c\uff1a\u5728\u62a5\u8868\u751f\u6210\u4e2d\u4f7f\u7528LPAD\u51fd\u6570\u5bf9\u6570\u636e\u8fdb\u884c\u5bf9\u9f50\u5904\u7406 \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u9500\u552e\u6570\u636e\u8868sales\uff0c\u5176\u4e2d\u5305\u542b\u9500\u552e\u4eba\u5458\u7684\u59d3\u540d\u548c\u9500\u552e\u989d\u3002\u5728\u751f\u6210\u9500\u552e\u62a5\u8868\u65f6\uff0c\u6211\u4eec\u5e0c\u671b\u9500\u552e\u4eba\u5458\u59d3\u540d\u5bf9\u9f50\uff0c\u5e76\u4e14\u5728\u59d3\u540d\u540e\u9762\u6dfb\u52a0\u56fa\u5b9a\u957f\u5ea6\u7684\u5206\u9694\u7b26\uff0c\u4ee5\u4fbf\u4e8e\u7f8e\u5316\u62a5\u8868\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a SELECT LPAD(salesperson_name, 15, ‘ ‘) || ‘ | ‘ || sales_amount AS formatted_sales_data FROM sales; \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528LPAD\u51fd\u6570\u5bf9\u9500\u552e\u4eba\u5458\u59d3\u540d\u8fdb\u884c\u5bf9\u9f50\u5904\u7406\uff0c\u957f\u5ea6\u4e3a15\u4e2a\u5b57\u7b26\uff0c\u7136\u540e\u5728\u59d3\u540d\u540e\u9762\u6dfb\u52a0\u4e00\u4e2a\u56fa\u5b9a\u7684\u5206\u9694\u7b26\u201c | \u201d\uff0c\u6700\u540e\u5c06\u5904\u7406\u540e\u7684\u9500\u552e\u6570\u636e\u5c55\u793a\u5728\u62a5\u8868\u4e2d\u3002 \u901a\u8fc7\u4ee5\u4e0a\u4e24\u4e2a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230LPAD\u51fd\u6570\u5728\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u65f6\u7684\u7075\u6d3b\u6027\u548c\u5b9e\u7528\u6027\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u60c5\u51b5\u6765\u7075\u6d3b\u8fd0\u7528LPAD\u51fd\u6570\uff0c\u4f7f\u8f93\u51fa\u7ed3\u679c\u66f4\u52a0\u7f8e\u89c2\u548c\u6613\u8bfb\u3002 \u603b\u7ed3 \u672c\u6587\u901a\u8fc7\u4e24\u4e2a\u5177\u4f53\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528Oracle\u4e2d\u7684LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002\u901a\u8fc7\u5bf9LPAD\u51fd\u6570\u7684\u7075\u6d3b\u8fd0\u7528\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u9700\u6c42\uff0c\u4e3a\u6570\u636e\u5c55\u793a\u548c\u62a5\u8868\u751f\u6210\u63d0\u4f9b\u66f4\u597d\u7684\u6548\u679c\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3LPAD\u51fd\u6570\u7684\u7528\u6cd5\uff0c\u5e76\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u7075\u6d3b\u8fd0\u7528LPAD\u51fd\u6570\u6765\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u9f50\u7684\u60c5\u51b5\u3002 \u4ee5\u4e0a\u5c31\u662f\u300a\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528Oracle\u7684LPAD\u51fd\u6570\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u5bf9\u9f50\uff1a\u8be6\u7ec6\u6f14\u793a\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eOracle,\u5b57\u7b26\u4e32,LPAD\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/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-44057","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/44057","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=44057"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/44057\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=44057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=44057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=44057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}