{"id":476593,"date":"2023-08-09T07:31:20","date_gmt":"2023-08-09T07:31:20","guid":{"rendered":""},"modified":"2023-09-05T11:13:02","modified_gmt":"2023-09-05T11:13:02","slug":"data-access","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/data-access\/","title":{"rendered":"\u6570\u636e\u5b58\u53d6"},"content":{"rendered":"<p>\u6570\u636e\u8bbf\u95ee\u662f\u4ece\u6570\u636e\u5e93\u6216\u6570\u636e\u4ed3\u5e93\u83b7\u53d6\u3001\u64cd\u4f5c\u3001\u5b58\u50a8\u548c\u68c0\u7d22\u6570\u636e\u7684\u80fd\u529b\u3002\u5b83\u6d89\u53ca\u6570\u636e\u5f55\u5165\u3001\u6570\u636e\u68c0\u7d22\u3001\u6570\u636e\u66f4\u65b0\u3001\u6570\u636e\u5220\u9664\u7b49\u591a\u4e2a\u8fc7\u7a0b\u3002\u8fd9\u4e2a\u6982\u5ff5\u5bf9\u4e8e\u4fe1\u606f\u6280\u672f\u7684\u8bb8\u591a\u65b9\u9762\u90fd\u81f3\u5173\u91cd\u8981\uff0c\u5305\u62ec\u5546\u4e1a\u667a\u80fd\u3001\u6570\u636e\u5206\u6790\u3001\u673a\u5668\u5b66\u4e60\u548c\u4eba\u5de5\u667a\u80fd\u3002\u6570\u636e\u8bbf\u95ee\u53ef\u4ee5\u8de8\u591a\u4e2a\u5e73\u53f0\u548c\u5e94\u7528\u7a0b\u5e8f\u9ad8\u6548\u3001\u51c6\u786e\u4e14\u5b89\u5168\u5730\u4f7f\u7528\u6570\u636e\u3002<\/p>\n<h2>\u6570\u636e\u8bbf\u95ee\u7b80\u53f2<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u7684\u51fa\u73b0\u53ef\u4ee5\u8ffd\u6eaf\u5230\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u65e9\u671f\u53d1\u5c55\u3002\u6570\u636e\u8bbf\u95ee\u7684\u9996\u6b21\u63d0\u53ca\u662f\u968f\u7740 20 \u4e16\u7eaa 60 \u5e74\u4ee3\u6570\u636e\u5e93\u7684\u521b\u5efa\u800c\u51fa\u73b0\u7684\u3002\u5728\u65e9\u671f\u9636\u6bb5\uff0c\u6570\u636e\u5b58\u50a8\u5728\u5206\u5c42\u6216\u7f51\u7edc\u6570\u636e\u5e93\u4e2d\uff0c\u6570\u636e\u8bbf\u95ee\u76f8\u5f53\u6709\u9650\u4e14\u590d\u6742\u3002 EF Codd \u5728 20 \u4e16\u7eaa 70 \u5e74\u4ee3\u63d0\u51fa\u7684\u5173\u7cfb\u6570\u636e\u5e93\u6a21\u578b\u901a\u8fc7\u63d0\u4f9b\u66f4\u7b80\u5355\u3001\u7075\u6d3b\u4e14\u66f4\u9ad8\u6548\u7684\u6570\u636e\u64cd\u4f5c\u65b9\u5f0f\u5f7b\u5e95\u6539\u53d8\u4e86\u6570\u636e\u8bbf\u95ee\u3002 SQL\uff08\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff09\u7684\u51fa\u73b0\u8fdb\u4e00\u6b65\u589e\u5f3a\u4e86\u6570\u636e\u7684\u53ef\u8bbf\u95ee\u6027\uff0c\u4e3a\u67e5\u8be2\u548c\u64cd\u4f5c\u6570\u636e\u63d0\u4f9b\u4e86\u6807\u51c6\u5316\u7684\u8bed\u8a00\u3002<\/p>\n<h2>\u6269\u5c55\u6570\u636e\u8bbf\u95ee\u7684\u6982\u5ff5<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u662f\u6307\u7528\u6237\u4e0e\u6570\u636e\u5e93\u6216\u6570\u636e\u4ed3\u5e93\u4ea4\u4e92\u7684\u80fd\u529b\u3002\u5b83\u5305\u542b\u591a\u9879\u4efb\u52a1\uff0c\u5305\u62ec\u521b\u5efa\u3001\u8bfb\u53d6\u3001\u66f4\u65b0\u548c\u5220\u9664 (CRUD) \u6570\u636e\u3002\u5728\u66f4\u5e7f\u6cdb\u7684\u8303\u56f4\u5185\uff0c\u6570\u636e\u8bbf\u95ee\u8fd8\u6307\u56f4\u7ed5\u6570\u636e\u4f7f\u7528\u7684\u6743\u9650\u3001\u63a7\u5236\u548c\u5b89\u5168\u6027\u7684\u7ba1\u7406\u3002\u8fd9\u4e9b\u6743\u9650\u5b9a\u4e49\u4e86\u8c01\u53ef\u4ee5\u8bbf\u95ee\u67d0\u4e9b\u6570\u636e\u3001\u4ed6\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u505a\u4ec0\u4e48\u4ee5\u53ca\u4f55\u65f6\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u3002<\/p>\n<p>\u6570\u636e\u8bbf\u95ee\u901a\u5e38\u7531\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\u7ba1\u7406\uff0c\u5b83\u4e3a\u7528\u6237\u63d0\u4f9b\u4e0e\u5b58\u50a8\u6570\u636e\u4ea4\u4e92\u7684\u63a5\u53e3\u3002\u8fd9\u4e9b\u7cfb\u7edf\u5177\u6709\u5404\u79cd\u529f\u80fd\u6765\u5904\u7406\u590d\u6742\u7684\u67e5\u8be2\u3001\u6267\u884c\u6709\u6548\u7684\u6570\u636e\u64cd\u4f5c\u548c\u7ba1\u7406\u6570\u636e\u8bbf\u95ee\u6743\u9650\u3002<\/p>\n<h2>\u6570\u636e\u8bbf\u95ee\u7684\u5185\u90e8\u7ed3\u6784<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u64cd\u4f5c\u4ee5\u7ed3\u6784\u5316\u65b9\u5f0f\u53d1\u751f\u3002\u5176\u6838\u5fc3\u662f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\uff0c\u4e0e\u5e94\u7528\u5c42\u548c\u6570\u636e\u5c42\u4ea4\u4e92\u3002\u5728\u5178\u578b\u573a\u666f\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u5411 DBMS \u53d1\u9001\u6570\u636e\u8bf7\u6c42\u3002 DBMS \u5904\u7406\u8bf7\u6c42\uff0c\u4e0e\u6570\u636e\u5c42\uff08\u901a\u5e38\u5b58\u50a8\u5728\u7269\u7406\u6216\u57fa\u4e8e\u4e91\u7684\u670d\u52a1\u5668\u4e0a\uff09\u901a\u4fe1\uff0c\u4ee5\u6839\u636e\u8bf7\u6c42\u83b7\u53d6\u3001\u4fee\u6539\u6216\u5b58\u50a8\u6570\u636e\u3002<\/p>\n<p>\u6574\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u51e0\u4e2a\u90e8\u5206\uff1a<\/p>\n<ol>\n<li><strong>\u5e94\u7528\u5c42\uff1a<\/strong> \u8fd9\u662f\u6570\u636e\u8bf7\u6c42\u53d1\u8d77\u7684\u9762\u5411\u7528\u6237\u7684\u5c42\u3002<\/li>\n<li><strong>\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\uff1a<\/strong> \u5904\u7406\u6570\u636e\u8bf7\u6c42\u5e76\u7ba1\u7406\u4e0e\u6570\u636e\u5c42\u4ea4\u4e92\u7684\u8f6f\u4ef6\u3002<\/li>\n<li><strong>\u6570\u636e\u5c42\uff1a<\/strong> \u5b9e\u9645\u6570\u636e\u6240\u5728\u7684\u7269\u7406\u6216\u865a\u62df\u5b58\u50a8\u3002<\/li>\n<\/ol>\n<h2>\u6570\u636e\u8bbf\u95ee\u7684\u4e3b\u8981\u7279\u70b9<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u6709\u51e0\u4e2a\u5173\u952e\u7279\u5f81\u5b9a\u4e49\u4e86\u5176\u6548\u7528\uff1a<\/p>\n<ol>\n<li><strong>\u6548\u7387\uff1a<\/strong> \u6570\u636e\u8bbf\u95ee\u673a\u5236\u65e8\u5728\u5feb\u901f\u6709\u6548\u5730\u5904\u7406\u5927\u91cf\u6570\u636e\u3002<\/li>\n<li><strong>\u5b89\u5168\uff1a<\/strong> \u5b89\u5168\u6027\u5bf9\u4e8e\u6570\u636e\u8bbf\u95ee\u81f3\u5173\u91cd\u8981\u3002 DBMS \u901a\u5e38\u5305\u62ec\u7528\u6237\u8eab\u4efd\u9a8c\u8bc1\u3001\u8bbf\u95ee\u63a7\u5236\u548c\u6570\u636e\u52a0\u5bc6\u529f\u80fd\u3002<\/li>\n<li><strong>\u5e76\u53d1\uff1a<\/strong> \u591a\u4e2a\u7528\u6237\u5e94\u8be5\u80fd\u591f\u540c\u65f6\u8bbf\u95ee\u6570\u636e\u800c\u4e0d\u5f71\u54cd\u6570\u636e\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u6570\u636e\u7684\u5b8c\u6574\u6027\uff1a<\/strong> \u5373\u4f7f\u5728\u540c\u65f6\u8bbf\u95ee\u671f\u95f4\uff0c\u6570\u636e\u8bbf\u95ee\u4e5f\u5e94\u4fdd\u6301\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\uff1a<\/strong> \u8be5\u673a\u5236\u5e94\u8be5\u63d0\u4f9b\u4e00\u4e2a\u6613\u4e8e\u7528\u6237\u4ea4\u4e92\u548c\u7406\u89e3\u7684\u754c\u9762\u3002<\/li>\n<\/ol>\n<h2>\u6570\u636e\u8bbf\u95ee\u7c7b\u578b<\/h2>\n<p>\u6709\u591a\u79cd\u7c7b\u578b\u7684\u6570\u636e\u8bbf\u95ee\u65b9\u6cd5\u3002\u4e0b\u9762\u7684\u8868\u683c\u5217\u51fa\u5e76\u89e3\u91ca\u4e86\u5176\u4e2d\u7684\u4e00\u4e9b\u5185\u5bb9\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u7c7b\u578b<\/th>\n<th style=\"text-align: left;\">\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>\u76f4\u63a5\u8bbf\u95ee<\/strong><\/td>\n<td style=\"text-align: left;\">\u53ef\u4ee5\u76f4\u63a5\u4ece\u5b58\u50a8\u4e2d\u7684\u7279\u5b9a\u4f4d\u7f6e\u68c0\u7d22\u6570\u636e\uff0c\u800c\u65e0\u9700\u5148\u8bfb\u53d6\u5176\u4ed6\u6570\u636e\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u987a\u5e8f\u5b58\u53d6<\/strong><\/td>\n<td style=\"text-align: left;\">\u6570\u636e\u6309\u987a\u5e8f\u8bfb\u53d6\uff0c\u5c31\u50cf\u78c1\u5e26\u4e00\u6837\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u5907\u4efd\u7cfb\u7edf\u548c\u6279\u5904\u7406\u4f5c\u4e1a\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u7d22\u5f15\u8bbf\u95ee<\/strong><\/td>\n<td style=\"text-align: left;\">\u7d22\u5f15\u7528\u4e8e\u52a0\u901f\u6570\u636e\u68c0\u7d22\u3002\u8be5\u7d22\u5f15\u5305\u542b\u5bf9\u5b9e\u9645\u6570\u636e\u4f4d\u7f6e\u7684\u5f15\u7528\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u968f\u673a\u8bbf\u95ee<\/strong><\/td>\n<td style=\"text-align: left;\">\u5b58\u50a8\u4e2d\u7684\u4efb\u4f55\u6570\u636e\u90fd\u53ef\u4ee5\u76f4\u63a5\u3001\u5feb\u901f\u5730\u8bbf\u95ee\uff0c\u65e0\u9700\u7ecf\u8fc7\u5176\u4ed6\u6570\u636e\u3002\u8fd9\u5728 RAM \u4e2d\u5f88\u5e38\u89c1\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u5229\u7528\u6570\u636e\u8bbf\u95ee\uff1a\u6311\u6218\u548c\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u9762\u4e34\u7740\u5404\u79cd\u6311\u6218\uff0c\u4f8b\u5982\u5b89\u5168\u95ee\u9898\u3001\u7ba1\u7406\u5927\u91cf\u6570\u636e\u3001\u6570\u636e\u5b8c\u6574\u6027\u548c\u517c\u5bb9\u6027\u95ee\u9898\u3002\u89e3\u51b3\u65b9\u6848\u901a\u5e38\u6d89\u53ca\u5b9e\u65bd\u5f3a\u5927\u7684 DBMS\u3001\u5b9e\u65bd\u4e25\u683c\u7684\u8bbf\u95ee\u63a7\u5236\u673a\u5236\u4ee5\u53ca\u4f7f\u7528\u5148\u8fdb\u7684\u6570\u636e\u5904\u7406\u7b97\u6cd5\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u6570\u636e\u5b89\u5168\u7684\u5e38\u89c1\u89e3\u51b3\u65b9\u6848\u662f\u4f7f\u7528\u8eab\u4efd\u9a8c\u8bc1\u673a\u5236\u548c\u52a0\u5bc6\u3002\u4e3a\u4e86\u5904\u7406\u5927\u91cf\u6570\u636e\uff0c\u4f01\u4e1a\u901a\u5e38\u4f7f\u7528\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6216\u4e91\u5b58\u50a8\u3002\u4e3a\u4e86\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\uff0c\u5b9e\u73b0\u4e86 ACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u3001\u6301\u4e45\u6027\uff09\u5c5e\u6027\u7b49\u4e8b\u52a1\u63a7\u5236\u673a\u5236\u3002<\/p>\n<h2>\u6bd4\u8f83\u4e0e\u7279\u70b9<\/h2>\n<p>\u6570\u636e\u8bbf\u95ee\u662fDBMS\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u4f46\u5b83\u4e0e\u5176\u4ed6\u76f8\u5173\u672f\u8bed\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6bd4\u8f83\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u5b66\u671f<\/th>\n<th style=\"text-align: left;\">\u63cf\u8ff0<\/th>\n<th style=\"text-align: left;\">\u4e0e\u6570\u636e\u8bbf\u95ee\u7684\u6bd4\u8f83<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>\u6570\u636e\u7ba1\u7406<\/strong><\/td>\n<td style=\"text-align: left;\">\u5b83\u6d89\u53ca\u7ec4\u7ec7\u4e2d\u6570\u636e\u7684\u6574\u4f53\u7ba1\u7406\u3002<\/td>\n<td style=\"text-align: left;\">\u6570\u636e\u8bbf\u95ee\u662f\u6570\u636e\u7ba1\u7406\u7684\u4e00\u4e2a\u7ec4\u6210\u90e8\u5206\uff0c\u6570\u636e\u7ba1\u7406\u8fd8\u6d89\u53ca\u6570\u636e\u6cbb\u7406\u3001\u6570\u636e\u8d28\u91cf\u548c\u6570\u636e\u96c6\u6210\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u6570\u636e\u6cbb\u7406<\/strong><\/td>\n<td style=\"text-align: left;\">\u8fd9\u662f\u5bf9\u6570\u636e\u7684\u53ef\u7528\u6027\u3001\u53ef\u7528\u6027\u3001\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\u7684\u6574\u4f53\u7ba1\u7406\u3002<\/td>\n<td style=\"text-align: left;\">\u6570\u636e\u8bbf\u95ee\u5c5e\u4e8e\u6570\u636e\u6cbb\u7406\u7684\u8303\u7574\uff0c\u5bf9\u4e8e\u786e\u4fdd\u6570\u636e\u53ef\u7528\u6027\u548c\u5b89\u5168\u6027\u81f3\u5173\u91cd\u8981\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u6570\u636e\u5b89\u5168<\/strong><\/td>\n<td style=\"text-align: left;\">\u4fdd\u62a4\u6570\u5b57\u6570\u636e\u514d\u53d7\u7834\u574f\u6027\u529b\u91cf\u3001\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\u6216\u6570\u636e\u6cc4\u9732\u7684\u505a\u6cd5\u3002<\/td>\n<td style=\"text-align: left;\">\u5fc5\u987b\u9002\u5f53\u76d1\u7ba1\u6570\u636e\u8bbf\u95ee\u4ee5\u786e\u4fdd\u6570\u636e\u5b89\u5168\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u6570\u636e\u8bbf\u95ee\u7684\u524d\u666f\u548c\u672a\u6765\u6280\u672f<\/h2>\n<p>\u968f\u7740\u65b0\u6280\u672f\u7684\u51fa\u73b0\uff0c\u6570\u636e\u8bbf\u95ee\u7684\u6982\u5ff5\u6b63\u5728\u8fc5\u901f\u53d1\u5c55\u3002\u57fa\u4e8e\u4e91\u7684\u7cfb\u7edf\u3001\u5b9e\u65f6\u6570\u636e\u5e93\u3001NoSQL 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href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1877050917308424\" target=\"_new\" rel=\"noopener nofollow\">\u5927\u6570\u636e\u65f6\u4ee3\u7684\u6570\u636e\u8bbf\u95ee<\/a><\/li>\n<\/ol>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476593","wiki","type-wiki","status-publish","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Access: The Key to Information and Insights<\/mark>","faq_items":[{"question":"What is Data Access?","answer":"<p>Data access is the ability to obtain, manipulate, store, and retrieve data from a database or data warehouse. It is a crucial aspect in various fields including business intelligence, data analytics, machine learning, and artificial intelligence.<\/p>"},{"question":"What is the history of Data Access?","answer":"<p>The concept of data access dates back to the development of databases in the 1960s. It gained significant traction with the emergence of the relational database model in the 1970s and the adoption of SQL (Structured Query Language) for standardized data querying and manipulation.<\/p>"},{"question":"How does Data Access work?","answer":"<p>Data access works through a database management system (DBMS) that processes data requests from an application and interacts with the data layer where data is stored. It involves several tasks including creating, reading, updating, and deleting (CRUD) data, along with managing data access permissions and security.<\/p>"},{"question":"What are the key features of Data Access?","answer":"<p>Key features of data access include efficiency in handling large volumes of data, security mechanisms, ability to support multiple users simultaneously (concurrency), data integrity maintenance, and usability of the interface.<\/p>"},{"question":"What are the different types of Data Access?","answer":"<p>Data access can be direct, sequential, indexed, or random. Direct access allows data to be retrieved directly from a specific location. Sequential access reads data in a sequence. Indexed access uses an index to speed up data retrieval, and random access allows any data in storage to be accessed directly and quickly.<\/p>"},{"question":"What are some challenges and solutions in Data Access?","answer":"<p>Challenges in data access can include security concerns, managing large volumes of data, maintaining data integrity, and compatibility issues. Solutions may involve robust database management systems, strict access control mechanisms, and advanced data processing algorithms.<\/p>"},{"question":"What is the future of Data Access?","answer":"<p>The future of data access lies in technologies such as cloud-based systems, real-time databases, NoSQL databases, and in-memory databases. With the rise of Big Data and AI, new data access architectures will continue to emerge.<\/p>"},{"question":"How are proxy servers related to Data Access?","answer":"<p>Proxy servers can help manage, filter, and control data access. They act as intermediaries for requests from clients seeking resources from other servers, thereby contributing to secure and controlled data access environments. A proxy server provider like OneProxy can provide high-speed, secure, and reliable proxy servers for such purposes.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476593\/revisions"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=476593"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}