{"id":196828,"date":"2024-11-14T02:51:19","date_gmt":"2024-11-13T18:51:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196828\/"},"modified":"2024-11-14T02:51:20","modified_gmt":"2024-11-13T18:51:20","slug":"%e5%91%a8%e5%b1%b9%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86%e5%8f%8a%e9%96%8b%e7%99%bc%e6%87%89%e7%94%a8%e4%b8%8b%e8%bc%89%e4%ba%ab%e5%8f%97%e9%ab%98%e8%b3%aa%e9%87%8f%e6%95%99%e8%82%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196828\/","title":{"rendered":"\u5468\u5c79\uff1a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u4e0b\u8f09\u4eab\u53d7\u9ad8\u8cea\u91cf\u6559\u80b2\u8cc7\u6e90 (\u5468\u5c79. \u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u4e0b\u8f09)"},"content":{"rendered":"<h1 id=\"%e5%91%a8%e5%b1%b9%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86%e5%8f%8a%e9%96%8b%e7%99%bc%e6%87%89%e7%94%a8%e4%b8%8b%e8%bc%89%e4%ba%ab%e5%8f%97%e9%ab%98%e8%b3%aa%e9%87%8f%e6%95%99%e8%82%b2-yXODdHQKwo\">\u5468\u5c79\uff1a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u4e0b\u8f09\u4eab\u53d7\u9ad8\u8cea\u91cf\u6559\u80b2\u8cc7\u6e90<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u5b57\u5316\u7684\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u61c9\u7528\u5df2\u7d93\u6210\u70ba\u5404\u884c\u5404\u696d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u4f01\u696d\u7ba1\u7406\u3001\u96fb\u5b50\u5546\u52d9\u9084\u662f\u793e\u4ea4\u5a92\u9ad4\uff0c\u6578\u64da\u5eab\u90fd\u5728\u80cc\u5f8c\u9ed8\u9ed8\u652f\u6301\u8457\u5404\u7a2e\u61c9\u7528\u7684\u904b\u884c\u3002\u5468\u5c79\u7684\u300a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u300b\u4e00\u66f8\uff0c\u6b63\u662f\u91dd\u5c0d\u9019\u4e00\u9700\u6c42\u800c\u7de8\u5beb\uff0c\u65e8\u5728\u5e6b\u52a9\u8b80\u8005\u6df1\u5165\u7406\u89e3\u6578\u64da\u5eab\u7684\u57fa\u672c\u539f\u7406\u53ca\u5176\u958b\u767c\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-yXODdHQKwo\">\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u6709\u7d44\u7e54\u7684\u6578\u64da\u96c6\u5408\uff0c\u901a\u5e38\u5b58\u5132\u5728\u8a08\u7b97\u6a5f\u7cfb\u7d71\u4e2d\u3002\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u662f\u7528\u4f86\u5275\u5efa\u3001\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u7684\u8edf\u4ef6\u3002\u5e38\u898b\u7684\u6578\u64da\u5eab\u985e\u578b\u5305\u62ec\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\uff09\u548c\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MongoDB\u3001Cassandra\uff09\u3002<\/p>\n<h3 id=\"%e9%97%9c%e4%bf%82%e5%9e%8b%e6%95%b8%e6%93%9a%e5%ba%ab-yXODdHQKwo\">\u95dc\u4fc2\u578b\u6578\u64da\u5eab<\/h3>\n<p>\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4f7f\u7528\u8868\u683c\u4f86\u5b58\u5132\u6578\u64da\uff0c\u8868\u683c\u4e4b\u9593\u53ef\u4ee5\u901a\u904e\u9375\uff08Key\uff09\u9032\u884c\u95dc\u806f\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97\u6578\u64da\u7684\u67e5\u8a62\u548c\u7ba1\u7406\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4f7f\u7528SQL\u8a9e\u8a00\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u7528\u6236\u8868\u7684\u4ee3\u78bc\uff1a<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    UserName VARCHAR(100),\n    Email VARCHAR(100)\n);<\/code><\/pre>\n<h3 id=\"%e9%9d%9e%e9%97%9c%e4%bf%82%e5%9e%8b%e6%95%b8%e6%93%9a%e5%ba%ab-yXODdHQKwo\">\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab<\/h3>\n<p>\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u5247\u4e0d\u4f7f\u7528\u8868\u683c\u7d50\u69cb\uff0c\u800c\u662f\u4ee5\u6587\u6a94\u3001\u9375\u503c\u5c0d\u6216\u5716\u5f62\u7684\u5f62\u5f0f\u5b58\u5132\u6578\u64da\u3002\u9019\u7a2e\u9748\u6d3b\u6027\u4f7f\u5f97\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u5728\u8655\u7406\u5927\u6578\u64da\u548c\u9ad8\u4e26\u767c\u5834\u666f\u4e2d\u8868\u73fe\u51fa\u8272\u3002\u4f8b\u5982\uff0cMongoDB\u4f7f\u7528JSON\u683c\u5f0f\u4f86\u5b58\u5132\u6578\u64da\uff0c\u4ee5\u4e0b\u662f\u63d2\u5165\u4e00\u689d\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>db.users.insert({\n    UserName: \"John Doe\",\n    Email: \"john@example.com\"\n});<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e9%96%8b%e7%99%bc%e6%87%89%e7%94%a8-yXODdHQKwo\">\u6578\u64da\u5eab\u7684\u958b\u767c\u61c9\u7528<\/h2>\n<p>\u5468\u5c79\u7684\u66f8\u7c4d\u4e0d\u50c5\u6db5\u84cb\u4e86\u6578\u64da\u5eab\u7684\u57fa\u672c\u7406\u8ad6\uff0c\u9084\u6df1\u5165\u63a2\u8a0e\u4e86\u6578\u64da\u5eab\u7684\u958b\u767c\u61c9\u7528\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0c\u6578\u64da\u5eab\u7684\u61c9\u7528\u5834\u666f\u8d8a\u4f86\u8d8a\u5ee3\u6cdb\uff0c\u5f9e\u50b3\u7d71\u7684\u4f01\u696d\u7ba1\u7406\u7cfb\u7d71\u5230\u73fe\u4ee3\u7684\u96f2\u8a08\u7b97\u5e73\u53f0\uff0c\u6578\u64da\u5eab\u7684\u89d2\u8272\u6108\u767c\u91cd\u8981\u3002<\/p>\n<h3 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9c%a8%e4%bc%81%e6%a5%ad%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-yXODdHQKwo\">\u6578\u64da\u5eab\u5728\u4f01\u696d\u4e2d\u7684\u61c9\u7528<\/h3>\n<p>\u5728\u4f01\u696d\u4e2d\uff0c\u6578\u64da\u5eab\u901a\u5e38\u7528\u65bc\u5b58\u5132\u5ba2\u6236\u4fe1\u606f\u3001\u92b7\u552e\u6578\u64da\u548c\u8ca1\u52d9\u5831\u8868\u7b49\u3002\u901a\u904e\u6578\u64da\u5eab\uff0c\u4f01\u696d\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u5f9e\u800c\u505a\u51fa\u66f4\u660e\u667a\u7684\u5546\u696d\u6c7a\u7b56\u3002\u4f8b\u5982\uff0c\u4f7f\u7528SQL\u67e5\u8a62\u4f86\u5206\u6790\u92b7\u552e\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT UserName, COUNT(*) AS PurchaseCount\nFROM Purchases\nGROUP BY UserName\nORDER BY PurchaseCount DESC;<\/code><\/pre>\n<h3 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9c%a8%e9%9b%b2%e8%a8%88%e7%ae%97%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-yXODdHQKwo\">\u6578\u64da\u5eab\u5728\u96f2\u8a08\u7b97\u4e2d\u7684\u61c9\u7528<\/h3>\n<p>\u96a8\u8457\u96f2\u8a08\u7b97\u7684\u8208\u8d77\uff0c\u8d8a\u4f86\u8d8a\u591a\u7684\u4f01\u696d\u9078\u64c7\u5c07\u6578\u64da\u5eab\u90e8\u7f72\u5728\u96f2\u7aef\u3002\u9019\u4e0d\u50c5\u964d\u4f4e\u4e86\u786c\u4ef6\u6210\u672c\uff0c\u9084\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u53ef\u8a2a\u554f\u6027\u548c\u5b89\u5168\u6027\u3002\u8a31\u591a\u96f2\u670d\u52d9\u63d0\u4f9b\u5546\uff08\u5982AWS\u3001Azure\uff09\u90fd\u63d0\u4f9b\u4e86\u6578\u64da\u5eab\u5373\u670d\u52d9\uff08DBaaS\uff09\uff0c\u4f7f\u5f97\u4f01\u696d\u53ef\u4ee5\u5c08\u6ce8\u65bc\u696d\u52d9\u958b\u767c\uff0c\u800c\u7121\u9700\u64d4\u5fc3\u5e95\u5c64\u57fa\u790e\u8a2d\u65bd\u7684\u7ba1\u7406\u3002<\/p>\n<h2 id=\"%e9%ab%98%e8%b3%aa%e9%87%8f%e6%95%99%e8%82%b2%e8%b3%87%e6%ba%90%e7%9a%84%e7%8d%b2%e5%8f%96-yXODdHQKwo\">\u9ad8\u8cea\u91cf\u6559\u80b2\u8cc7\u6e90\u7684\u7372\u53d6<\/h2>\n<p>\u5468\u5c79\u7684\u300a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u300b\u4e00\u66f8\u63d0\u4f9b\u4e86\u8c50\u5bcc\u7684\u6559\u80b2\u8cc7\u6e90\uff0c\u8b80\u8005\u53ef\u4ee5\u901a\u904e\u4e0b\u8f09\u7372\u53d6\u9019\u4e9b\u8cc7\u6e90\uff0c\u9032\u4e00\u6b65\u63d0\u5347\u81ea\u5df1\u7684\u6578\u64da\u5eab\u77e5\u8b58\u548c\u6280\u80fd\u3002\u6b64\u5916\uff0c\u66f8\u4e2d\u9084\u5305\u542b\u4e86\u5927\u91cf\u7684\u5be6\u4f8b\u548c\u7df4\u7fd2\u984c\uff0c\u5e6b\u52a9\u8b80\u8005\u5728\u5be6\u8e10\u4e2d\u978f\u56fa\u6240\u5b78\u77e5\u8b58\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yXODdHQKwo\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u6280\u8853\u5728\u73fe\u4ee3\u793e\u6703\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\uff0c\u90fd\u9700\u8981\u638c\u63e1\u76f8\u95dc\u7684\u77e5\u8b58\u548c\u6280\u80fd\u3002\u5468\u5c79\u7684\u300a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u300b\u70ba\u8b80\u8005\u63d0\u4f9b\u4e86\u9ad8\u8cea\u91cf\u7684\u6559\u80b2\u8cc7\u6e90\uff0c\u5e6b\u52a9\u4ed6\u5011\u5728\u9019\u4e00\u9818\u57df\u4e2d\u53d6\u5f97\u6210\u529f\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u5b78\u7fd2\u548c\u61c9\u7528\u6709\u8208\u8da3\uff0c\u5efa\u8b70\u60a8\u6df1\u5165\u4e86\u89e3\u76f8\u95dc\u8cc7\u6e90\uff0c\u4e26\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u81ea\u5df1\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u9032\u884c\u5be6\u8e10\u548c\u63a2\u7d22\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0b\u8f09\u5468\u5c79\u7684\u300a\u6578\u64da\u5eab\u539f\u7406\u53ca\u958b\u767c\u61c9\u7528\u300b\uff0c\u4eab\u53d7\u9ad8\u8cea\u91cf\u6559\u80b2\u8cc7\u6e90\uff0c\u63d0\u5347\u6578\u64da\u5eab\u77e5\u8b58\u8207\u958b\u767c\u6280\u80fd\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-196828","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196828","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=196828"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196828\/revisions"}],"predecessor-version":[{"id":196829,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196828\/revisions\/196829"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}