{"id":61057,"date":"2024-10-13T08:04:13","date_gmt":"2024-10-13T00:04:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61057\/"},"modified":"2024-10-13T08:04:13","modified_gmt":"2024-10-13T00:04:13","slug":"dbf%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%af%a9%e9%81%b8%e6%8a%80%e5%b7%a7-dbf%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a6%82%e4%bd%95%e7%af%a9%e9%81%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61057\/","title":{"rendered":"DBF\u6578\u64da\u5eab\u7684\u7be9\u9078\u6280\u5de7 (dbf\u6578\u64da\u5eab\u5982\u4f55\u7be9\u9078)"},"content":{"rendered":"<h1 id=\"dbf%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%af%a9%e9%81%b8%e6%8a%80%e5%b7%a7-XEVXmrydic\">DBF\u6578\u64da\u5eab\u7684\u7be9\u9078\u6280\u5de7<\/h1>\n<p>DBF\uff08DataBase File\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u6578\u64da\u5eab\u6587\u4ef6\u683c\u5f0f\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u7279\u5225\u662f\u5728\u65e9\u671f\u7684\u684c\u9762\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u7ba1\u7406\u7cfb\u7d71\u4e2d\u3002DBF\u6587\u4ef6\u901a\u5e38\u8207dBase\u3001FoxPro\u7b49\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u76f8\u7d50\u5408\u4f7f\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0eDBF\u6578\u64da\u5eab\u7684\u7be9\u9078\u6280\u5de7\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002<\/p>\n<h2 id=\"dbf%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-XEVXmrydic\">DBF\u6578\u64da\u5eab\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u5728\u6df1\u5165\u7be9\u9078\u6280\u5de7\u4e4b\u524d\uff0c\u4e86\u89e3DBF\u6578\u64da\u5eab\u7684\u57fa\u672c\u7d50\u69cb\u662f\u5fc5\u8981\u7684\u3002DBF\u6587\u4ef6\u7531\u591a\u500b\u8a18\u9304\u7d44\u6210\uff0c\u6bcf\u500b\u8a18\u9304\u5305\u542b\u591a\u500b\u5b57\u6bb5\u3002\u6bcf\u500b\u5b57\u6bb5\u90fd\u6709\u5176\u7279\u5b9a\u7684\u6578\u64da\u985e\u578b\uff0c\u5982\u5b57\u7b26\u3001\u6578\u5b57\u6216\u65e5\u671f\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97DBF\u6587\u4ef6\u80fd\u5920\u9ad8\u6548\u5730\u5b58\u5132\u548c\u6aa2\u7d22\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%af%a9%e9%81%b8%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-XEVXmrydic\">\u7be9\u9078\u6578\u64da\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u7be9\u9078DBF\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528\u67e5\u8a62\u8a9e\u8a00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u7be9\u9078\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528WHERE\u5b50\u53e5\uff1a<\/strong>\u5728SQL\u67e5\u8a62\u4e2d\uff0cWHERE\u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u7be9\u9078\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/li>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u5e74\u9f61 &gt; 30;<\/code><\/pre>\n<li><strong>\u4f7f\u7528LIKE\u904b\u7b97\u7b26\uff1a<\/strong>\u7576\u9700\u8981\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528LIKE\u904b\u7b97\u7b26\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u59d3\u540d\u4ee5\u201c\u5f35\u201d\u958b\u982d\u7684\u6240\u6709\u8a18\u9304\uff1a<\/li>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u59d3\u540d LIKE '\u5f35%';<\/code><\/pre>\n<li><strong>\u4f7f\u7528BETWEEN\u904b\u7b97\u7b26\uff1a<\/strong>\u6b64\u904b\u7b97\u7b26\u53ef\u7528\u65bc\u7be9\u9078\u5728\u7279\u5b9a\u7bc4\u570d\u5167\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u572820\u523030\u4e4b\u9593\u7684\u8a18\u9304\uff1a<\/li>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u5e74\u9f61 BETWEEN 20 AND 30;<\/code><\/pre>\n<\/ul>\n<h2 id=\"%e9%80%b2%e9%9a%8e%e7%af%a9%e9%81%b8%e6%8a%80%e5%b7%a7-XEVXmrydic\">\u9032\u968e\u7be9\u9078\u6280\u5de7<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u7be9\u9078\u65b9\u6cd5\uff0c\u9084\u6709\u4e00\u4e9b\u9032\u968e\u6280\u5de7\u53ef\u4ee5\u63d0\u9ad8\u7be9\u9078\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u591a\u689d\u4ef6\u7be9\u9078\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528AND\u548cOR\u904b\u7b97\u7b26\u4f86\u7d44\u5408\u591a\u500b\u7be9\u9078\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u4e14\u6027\u5225\u70ba\u201c\u7537\u201d\u7684\u8a18\u9304\uff1a<\/li>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u5e74\u9f61 &gt; 30 AND \u6027\u5225 = '\u7537';<\/code><\/pre>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u53ef\u4ee5\u5728DBF\u6587\u4ef6\u4e2d\u70ba\u5e38\u7528\u7684\u67e5\u8a62\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u6578\u64da\u6aa2\u7d22\u7684\u901f\u5ea6\u3002<\/li>\n<li><strong>\u6578\u64da\u5206\u7d44\uff1a<\/strong>\u4f7f\u7528GROUP BY\u5b50\u53e5\u53ef\u4ee5\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u5206\u7d44\uff0c\u4e26\u4f7f\u7528\u805a\u5408\u51fd\u6578\uff08\u5982COUNT\u3001SUM\u7b49\uff09\u4f86\u7372\u53d6\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u6bcf\u500b\u6027\u5225\u7684\u8a18\u9304\u6578\u91cf\uff1a<\/li>\n<pre><code>SELECT \u6027\u5225, COUNT(*) FROM \u8868\u540d GROUP BY \u6027\u5225;<\/code><\/pre>\n<\/ul>\n<h2 id=\"%e7%af%a9%e9%81%b8%e7%b5%90%e6%9e%9c%e7%9a%84%e8%99%95%e7%90%86-XEVXmrydic\">\u7be9\u9078\u7d50\u679c\u7684\u8655\u7406<\/h2>\n<p>\u7be9\u9078\u51fa\u6240\u9700\u7684\u6578\u64da\u5f8c\uff0c\u901a\u5e38\u9700\u8981\u9032\u4e00\u6b65\u8655\u7406\u9019\u4e9b\u7d50\u679c\u3002\u53ef\u4ee5\u5c07\u7be9\u9078\u7d50\u679c\u5c0e\u51fa\u70ba\u5176\u4ed6\u683c\u5f0f\uff08\u5982CSV\u3001Excel\u7b49\uff09\uff0c\u4ee5\u4fbf\u65bc\u5f8c\u7e8c\u5206\u6790\u6216\u5831\u544a\u751f\u6210\u3002\u8a31\u591a\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u90fd\u63d0\u4f9b\u4e86\u5c0e\u51fa\u529f\u80fd\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u6839\u64da\u9700\u8981\u9078\u64c7\u5408\u9069\u7684\u683c\u5f0f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-XEVXmrydic\">\u7e3d\u7d50<\/h2>\n<p>DBF\u6578\u64da\u5eab\u7684\u7be9\u9078\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u548c\u9032\u968e\u7684\u7be9\u9078\u65b9\u6cd5\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u67e5\u8a62\u548c\u8655\u7406\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528WHERE\u5b50\u53e5\u9032\u884c\u57fa\u672c\u67e5\u8a62\uff0c\u9084\u662f\u5229\u7528\u7d22\u5f15\u548c\u805a\u5408\u51fd\u6578\u9032\u884c\u8907\u96dc\u5206\u6790\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u66f4\u6df1\u5165\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1DBF\u6578\u64da\u5eab\u7be9\u9078\u6280\u5de7\uff0c\u8f15\u9b06\u67e5\u8a62\u548c\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\uff0c\u8b93\u6578\u64da\u5206\u6790\u66f4\u7cbe\u6e96\u3002<\/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-61057","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61057","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=61057"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61057\/revisions"}],"predecessor-version":[{"id":61058,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61057\/revisions\/61058"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}