{"id":77774,"date":"2024-10-16T11:09:18","date_gmt":"2024-10-16T03:09:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77774\/"},"modified":"2024-10-16T11:09:19","modified_gmt":"2024-10-16T03:09:19","slug":"mysql%e6%8c%87%e4%bb%a4-blob%ef%bc%88%e4%ba%8c%e9%80%b2%e5%88%b6%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77774\/","title":{"rendered":"MySQL\u6307\u4ee4: BLOB\uff08\u4e8c\u9032\u5236\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-blob%ef%bc%88%e4%ba%8c%e9%80%b2%e5%88%b6%ef%bc%89-wahihdjGYW\">MySQL\u6307\u4ee4: BLOB\uff08\u4e8c\u9032\u5236\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u7279\u5225\u9069\u5408\u65bc\u7db2\u7d61\u61c9\u7528\u7a0b\u5e8f\u3002MySQL\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fBLOB\uff08Binary Large Object\uff09\uff0c\u5b83\u7528\u65bc\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u5982\u5716\u50cf\u3001\u97f3\u983b\u548c\u8996\u983b\u6587\u4ef6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684BLOB\u985e\u578b\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"blob%e7%9a%84%e5%ae%9a%e7%be%a9%e8%88%87%e9%a1%9e%e5%9e%8b-wahihdjGYW\">BLOB\u7684\u5b9a\u7fa9\u8207\u985e\u578b<\/h2>\n<p>BLOB\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u6578\u64da\u985e\u578b\uff0c\u5c08\u9580\u7528\u4f86\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\u3002MySQL\u63d0\u4f9b\u4e86\u56db\u7a2e\u4e0d\u540c\u985e\u578b\u7684BLOB\uff0c\u5206\u5225\u662f\uff1a<\/p>\n<ul>\n<li><strong>TINYBLOB<\/strong>: \u6700\u5927\u53ef\u5b58\u5132255\u5b57\u7bc0\u7684\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<li><strong>BLOB<\/strong>: \u6700\u5927\u53ef\u5b58\u513265,535\u5b57\u7bc0\u7684\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<li><strong>MEDIUMBLOB<\/strong>: \u6700\u5927\u53ef\u5b58\u513216,777,215\u5b57\u7bc0\u7684\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<li><strong>LONGBLOB<\/strong>: \u6700\u5927\u53ef\u5b58\u51324,294,967,295\u5b57\u7bc0\u7684\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u6839\u64da\u9700\u8981\u5b58\u5132\u7684\u6578\u64da\u5927\u5c0f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7\u5408\u9069\u7684BLOB\u985e\u578b\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8blob-wahihdjGYW\">\u5982\u4f55\u4f7f\u7528BLOB<\/h2>\n<p>\u5728MySQL\u4e2d\u4f7f\u7528BLOB\u985e\u578b\u7684\u57fa\u672c\u6b65\u9a5f\u5305\u62ec\u5275\u5efa\u8868\u3001\u63d2\u5165\u6578\u64da\u548c\u67e5\u8a62\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\u4ee3\u78bc\uff0c\u5e6b\u52a9\u60a8\u7406\u89e3\u5982\u4f55\u64cd\u4f5cBLOB\u6578\u64da\u3002<\/p>\n<h3 id=\"%e5%89%b5%e5%bb%ba%e8%a1%a8-wahihdjGYW\">\u5275\u5efa\u8868<\/h3>\n<pre><code>\nCREATE TABLE images (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    image_data LONGBLOB NOT NULL,\n    description VARCHAR(255)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70baimages\u7684\u8868\uff0c\u5305\u542b\u4e00\u500bLONGBLOB\u985e\u578b\u7684image_data\u6b04\u4f4d\uff0c\u7528\u65bc\u5b58\u5132\u5716\u50cf\u6578\u64da\u3002<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-wahihdjGYW\">\u63d2\u5165\u6578\u64da<\/h3>\n<p>\u63d2\u5165BLOB\u6578\u64da\u6642\uff0c\u901a\u5e38\u9700\u8981\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u4f86\u907f\u514dSQL\u6ce8\u5165\u653b\u64ca\u3002\u4ee5\u4e0b\u662f\u63d2\u5165\u5716\u50cf\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nINSERT INTO images (image_data, description) VALUES (?, ?);\n<\/code><\/pre>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u60a8\u9700\u8981\u4f7f\u7528\u76f8\u61c9\u7684\u7de8\u7a0b\u8a9e\u8a00\uff08\u5982PHP\u3001Python\u7b49\uff09\u4f86\u8b80\u53d6\u5716\u50cf\u6587\u4ef6\u4e26\u5c07\u5176\u4f5c\u70ba\u53c3\u6578\u50b3\u905e\u7d66\u9810\u8655\u7406\u8a9e\u53e5\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-wahihdjGYW\">\u67e5\u8a62\u6578\u64da<\/h3>\n<p>\u67e5\u8a62BLOB\u6578\u64da\u6642\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528SELECT\u8a9e\u53e5\u4f86\u7372\u53d6\u5b58\u5132\u7684\u4e8c\u9032\u5236\u6578\u64da\uff1a<\/p>\n<pre><code>\nSELECT image_data FROM images WHERE id = ?;\n<\/code><\/pre>\n<p>\u67e5\u8a62\u5f8c\uff0c\u60a8\u53ef\u4ee5\u5c07\u7372\u53d6\u7684\u4e8c\u9032\u5236\u6578\u64da\u8f49\u63db\u70ba\u5716\u50cf\u683c\u5f0f\u4e26\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u986f\u793a\u3002<\/p>\n<h2 id=\"blob%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-wahihdjGYW\">BLOB\u7684\u512a\u7f3a\u9ede<\/h2>\n<p>\u4f7f\u7528BLOB\u985e\u578b\u6709\u5176\u512a\u7f3a\u9ede\uff1a<\/p>\n<h3 id=\"%e5%84%aa%e9%bb%9e-wahihdjGYW\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u80fd\u5920\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u9069\u5408\u65bc\u591a\u5a92\u9ad4\u61c9\u7528\u3002<\/li>\n<li>\u6578\u64da\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u4fbf\u65bc\u7ba1\u7406\u548c\u5099\u4efd\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-wahihdjGYW\">\u7f3a\u9ede<\/h3>\n<ul>\n<li>\u6578\u64da\u5eab\u7684\u5927\u5c0f\u53ef\u80fd\u6703\u8fc5\u901f\u589e\u9577\uff0c\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li>\u5c0d\u65bc\u5927\u6587\u4ef6\u7684\u8b80\u53d6\u548c\u5beb\u5165\u901f\u5ea6\u53ef\u80fd\u8f03\u6162\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wahihdjGYW\">\u7e3d\u7d50<\/h2>\n<p>BLOB\u985e\u578b\u5728MySQL\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u9069\u5408\u7528\u65bc\u5b58\u5132\u5404\u7a2e\u4e8c\u9032\u5236\u6578\u64da\u3002\u7121\u8ad6\u662f\u5716\u50cf\u3001\u97f3\u983b\u9084\u662f\u8996\u983b\uff0cBLOB\u90fd\u80fd\u63d0\u4f9b\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u7136\u800c\uff0c\u958b\u767c\u8005\u5728\u4f7f\u7528BLOB\u6642\u4e5f\u9700\u8003\u616e\u5230\u6027\u80fd\u548c\u6578\u64da\u5eab\u5927\u5c0f\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u5b58\u5132\u548c\u7ba1\u7406\u6578\u64da\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u90e8\u7f72\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684BLOB\u6307\u4ee4\uff0c\u5982\u4f55\u5b58\u50a8\u548c\u7ba1\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u63d0\u5347\u6570\u636e\u5e93\u6027\u80fd\u4e0e\u7075\u6d3b\u6027\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-77774","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77774","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=77774"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77774\/revisions"}],"predecessor-version":[{"id":77775,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77774\/revisions\/77775"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}