{"id":80126,"date":"2024-10-16T13:54:15","date_gmt":"2024-10-16T05:54:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80126\/"},"modified":"2024-10-16T13:54:15","modified_gmt":"2024-10-16T05:54:15","slug":"mysql%e6%8c%87%e4%bb%a4-unhex%ef%bc%88%e5%8d%81%e5%85%ad%e9%80%b2%e5%88%b6%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e6%8f%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80126\/","title":{"rendered":"MySQL\u6307\u4ee4: UNHEX()\uff08\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-unhex%ef%bc%88%e5%8d%81%e5%85%ad%e9%80%b2%e5%88%b6%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e6%8f%9b%ef%bc%89-NAAacfKBib\">MySQL\u6307\u4ee4: UNHEX()\uff08\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u8f49\u63db\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fUNHEX()\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u7684\u4e3b\u8981\u7528\u9014\u662f\u5c07\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5176\u5c0d\u61c9\u7684\u4e8c\u9032\u5236\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eUNHEX()\u51fd\u6578\u7684\u7528\u6cd5\u3001\u8a9e\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"unhex%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-NAAacfKBib\">UNHEX()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>UNHEX()\u51fd\u6578\u7684\u57fa\u672c\u529f\u80fd\u662f\u5c07\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u4e8c\u9032\u5236\u5b57\u7b26\u4e32\u3002\u9019\u5728\u8655\u7406\u52a0\u5bc6\u6578\u64da\u6216\u9700\u8981\u5c07\u6578\u64da\u4ee5\u4e8c\u9032\u5236\u5f62\u5f0f\u5b58\u5132\u6642\u7279\u5225\u6709\u7528\u3002UNHEX()\u51fd\u6578\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UNHEX(str)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>str<\/code>\u662f\u8981\u8f49\u63db\u7684\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8a72\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u5fc5\u9808\u662f\u5076\u6578\uff0c\u5426\u5247UNHEX()\u5c07\u8fd4\u56deNULL\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-NAAacfKBib\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528UNHEX()\u51fd\u6578\u7684\u793a\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b1-%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-NAAacfKBib\">\u793a\u4f8b1: \u57fa\u672c\u7528\u6cd5<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32&#8217;48656C6C6F&#8217;\uff0c\u6211\u5011\u5e0c\u671b\u5c07\u5176\u8f49\u63db\u70ba\u4e8c\u9032\u5236\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT UNHEX('48656C6C6F') AS binary_data;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f\u4e8c\u9032\u5236\u6578\u64da\uff0c\u5c0d\u61c9\u65bc\u5b57\u7b26\u4e32&#8217;Hello&#8217;\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b2-%e8%88%87%e5%85%b6%e4%bb%96%e5%87%bd%e6%95%b8%e7%b5%90%e5%90%88%e4%bd%bf%e7%94%a8-NAAacfKBib\">\u793a\u4f8b2: \u8207\u5176\u4ed6\u51fd\u6578\u7d50\u5408\u4f7f\u7528<\/h3>\n<p>UNHEX()\u51fd\u6578\u53ef\u4ee5\u8207\u5176\u4ed6MySQL\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\uff0c\u6211\u5011\u5e0c\u671b\u5c07\u5176\u8f49\u63db\u4e26\u986f\u793a\u70ba\u53ef\u8b80\u7684\u6587\u672c\uff1a<\/p>\n<pre><code>SELECT UNHEX(hex_column) AS readable_text FROM my_table;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>hex_column<\/code>\u662f\u5b58\u5132\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u7684\u5217\uff0c\u67e5\u8a62\u5c07\u8fd4\u56de\u53ef\u8b80\u7684\u6587\u672c\u683c\u5f0f\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-NAAacfKBib\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u5fc5\u9808\u662f\u5076\u6578\uff0c\u5426\u5247UNHEX()\u5c07\u8fd4\u56deNULL\u3002<\/li>\n<li>UNHEX()\u51fd\u6578\u50c5\u9069\u7528\u65bcMySQL\u6578\u64da\u5eab\uff0c\u5176\u4ed6\u6578\u64da\u5eab\u7cfb\u7d71\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u5be6\u73fe\u65b9\u5f0f\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528UNHEX()\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-NAAacfKBib\">\u61c9\u7528\u5834\u666f<\/h2>\n<p>UNHEX()\u51fd\u6578\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u52a0\u5bc6\uff1a\u5728\u5b58\u5132\u52a0\u5bc6\u6578\u64da\u6642\uff0c\u901a\u5e38\u6703\u5c07\u5176\u8f49\u63db\u70ba\u5341\u516d\u9032\u5236\u683c\u5f0f\uff0cUNHEX()\u53ef\u4ee5\u5e6b\u52a9\u5c07\u5176\u8f49\u63db\u56de\u539f\u59cb\u4e8c\u9032\u5236\u683c\u5f0f\u3002<\/li>\n<li>\u6578\u64da\u8f49\u63db\uff1a\u5728\u6578\u64da\u9077\u79fb\u6216\u6574\u5408\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5c07\u5341\u516d\u9032\u5236\u6578\u64da\u8f49\u63db\u70ba\u4e8c\u9032\u5236\u683c\u5f0f\u4ee5\u4fbf\u9032\u884c\u9032\u4e00\u6b65\u8655\u7406\u3002<\/li>\n<li>\u6578\u64da\u5206\u6790\uff1a\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u6642\uff0c\u5c07\u5341\u516d\u9032\u5236\u6578\u64da\u8f49\u63db\u70ba\u53ef\u8b80\u683c\u5f0f\u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u5e2b\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NAAacfKBib\">\u7e3d\u7d50<\/h2>\n<p>UNHEX()\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5c07\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u4e8c\u9032\u5236\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u52a0\u5bc6\u3001\u6578\u64da\u8f49\u63db\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\uff0cUNHEX()\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4UNHEX()\uff0c\u5c07\u5341\u516d\u9032\u5236\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u539f\u59cb\u5b57\u7bc0\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u8207\u5b58\u5132\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-80126","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80126","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=80126"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80126\/revisions"}],"predecessor-version":[{"id":80127,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80126\/revisions\/80127"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}