{"id":186344,"date":"2024-11-11T05:08:19","date_gmt":"2024-11-10T21:08:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186344\/"},"modified":"2024-11-11T05:08:20","modified_gmt":"2024-11-10T21:08:20","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%98%e5%84%b2%e8%a6%81%e9%bb%9e%ef%bc%9a%e4%ba%86%e8%a7%a3%e4%b8%80%e6%a2%9d%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%b9%e9%87%8f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186344\/","title":{"rendered":"\u6578\u64da\u5eab\u5b58\u5132\u8981\u9ede\uff1a\u4e86\u89e3\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\uff08\u6578\u64da\u5eab\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%98%e5%84%b2%e8%a6%81%e9%bb%9e%ef%bc%9a%e4%ba%86%e8%a7%a3%e4%b8%80%e6%a2%9d%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%b9%e9%87%8f-WXULvbibxW\">\u6578\u64da\u5eab\u5b58\u5132\u8981\u9ede\uff1a\u4e86\u89e3\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u548c\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\u7528\u6236\uff0c\u4e86\u89e3\u6578\u64da\u5eab\u4e2d\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\u5c0d\u65bc\u6709\u6548\u7684\u6578\u64da\u5b58\u5132\u548c\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u4e2d\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u898b\u89e3\u548c\u793a\u4f8b\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-WXULvbibxW\">\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\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u5b58\u5132\u3002\u6bcf\u500b\u8868\u683c\u7531\u884c\u548c\u5217\u7d44\u6210\uff0c\u5176\u4e2d\u6bcf\u4e00\u884c\u4ee3\u8868\u4e00\u689d\u6578\u64da\u8a18\u9304\uff0c\u800c\u6bcf\u4e00\u5217\u5247\u4ee3\u8868\u6578\u64da\u7684\u5c6c\u6027\u3002\u4e86\u89e3\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\uff0c\u9996\u5148\u9700\u8981\u660e\u767d\u6578\u64da\u7684\u985e\u578b\u548c\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%8f%8a%e5%85%b6%e5%ae%b9%e9%87%8f-WXULvbibxW\">\u6578\u64da\u985e\u578b\u53ca\u5176\u5bb9\u91cf<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u4f54\u7528\u7684\u5b58\u5132\u7a7a\u9593\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u985e\u578b\u53ca\u5176\u5bb9\u91cf\uff1a<\/p>\n<ul>\n<li><strong>\u6574\u6578\uff08Integer\uff09<\/strong>: \u901a\u5e38\u4f54\u75284\u5b57\u7bc0\uff0c\u7bc4\u570d\u5f9e-2,147,483,648\u52302,147,483,647\u3002<\/li>\n<li><strong>\u6d6e\u9ede\u6578\uff08Float\uff09<\/strong>: \u901a\u5e38\u4f54\u75284\u5b57\u7bc0\uff0c\u9069\u5408\u5b58\u5132\u5c0f\u6578\u3002<\/li>\n<li><strong>\u5b57\u7b26\uff08Char\uff09<\/strong>: \u6bcf\u500b\u5b57\u7b26\u4f54\u75281\u5b57\u7bc0\uff0c\u56fa\u5b9a\u9577\u5ea6\u3002<\/li>\n<li><strong>\u8b8a\u9577\u5b57\u7b26\uff08Varchar\uff09<\/strong>: \u6bcf\u500b\u5b57\u7b26\u4f54\u75281\u5b57\u7bc0\uff0c\u4e26\u6839\u64da\u5be6\u969b\u9577\u5ea6\u4f54\u7528\u984d\u5916\u76841-2\u5b57\u7bc0\u3002<\/li>\n<li><strong>\u65e5\u671f\uff08Date\uff09<\/strong>: \u901a\u5e38\u4f54\u75283\u5b57\u7bc0\u3002<\/li>\n<li><strong>\u6642\u9593\u6233\uff08Timestamp\uff09<\/strong>: \u901a\u5e38\u4f54\u75284\u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a8%88%e7%ae%97%e4%b8%80%e6%a2%9d%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%b9%e9%87%8f-WXULvbibxW\">\u8a08\u7b97\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf<\/h2>\n<p>\u8981\u8a08\u7b97\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u8a72\u6578\u64da\u7684\u6240\u6709\u5c6c\u6027\u53ca\u5176\u5c0d\u61c9\u7684\u6578\u64da\u985e\u578b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nCREATE TABLE Users (\n    UserID INT,\n    UserName VARCHAR(50),\n    UserEmail VARCHAR(100),\n    UserAge INT,\n    CreatedAt TIMESTAMP\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u8a08\u7b97\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>UserID: 4\u5b57\u7bc0<\/li>\n<li>UserName: 50\u5b57\u7bc0 + 1\u5b57\u7bc0\uff08\u8b8a\u9577\u5b57\u7b26\u7684\u984d\u5916\u958b\u92b7\uff09<\/li>\n<li>UserEmail: 100\u5b57\u7bc0 + 1\u5b57\u7bc0<\/li>\n<li>UserAge: 4\u5b57\u7bc0<\/li>\n<li>CreatedAt: 4\u5b57\u7bc0<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u7e3d\u5bb9\u91cf\u70ba\uff1a<\/p>\n<pre><code>\n4 + (50 + 1) + (100 + 1) + 4 + 4 = 164\u5b57\u7bc0\n<\/code><\/pre>\n<h2 id=\"%e5%bd%b1%e9%9f%bf%e6%95%b8%e6%93%9a%e5%ae%b9%e9%87%8f%e7%9a%84%e5%9b%a0%e7%b4%a0-WXULvbibxW\">\u5f71\u97ff\u6578\u64da\u5bb9\u91cf\u7684\u56e0\u7d20<\/h2>\n<p>\u9664\u4e86\u6578\u64da\u985e\u578b\u5916\uff0c\u9084\u6709\u5176\u4ed6\u56e0\u7d20\u6703\u5f71\u97ff\u6578\u64da\u7684\u5bb9\u91cf\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15<\/strong>: \u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6578\u64da\u5eab\u901a\u5e38\u6703\u70ba\u67d0\u4e9b\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u9019\u6703\u589e\u52a0\u5b58\u5132\u9700\u6c42\u3002<\/li>\n<li><strong>\u6578\u64da\u5197\u9918<\/strong>: \u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u53ef\u80fd\u6703\u91cd\u8907\u5b58\u5132\u67d0\u4e9b\u6578\u64da\uff0c\u9019\u6703\u589e\u52a0\u6574\u9ad4\u5bb9\u91cf\u3002<\/li>\n<li><strong>\u6578\u64da\u58d3\u7e2e<\/strong>: \u4e00\u4e9b\u6578\u64da\u5eab\u7cfb\u7d71\u652f\u6301\u6578\u64da\u58d3\u7e2e\u6280\u8853\uff0c\u53ef\u4ee5\u6e1b\u5c11\u5b58\u5132\u7a7a\u9593\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-WXULvbibxW\">\u7d50\u8ad6<\/h2>\n<p>\u4e86\u89e3\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u548c\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6b63\u78ba\u8a08\u7b97\u548c\u8a55\u4f30\u6578\u64da\u7684\u5bb9\u91cf\uff0c\u4f01\u696d\u548c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528\u5b58\u5132\u8cc7\u6e90\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u5b58\u5132\u548c\u7ba1\u7406\u7684\u7528\u6236\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u7b49\u89e3\u6c7a\u65b9\u6848\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u4e2d\u4e00\u689d\u6578\u64da\u7684\u5bb9\u91cf\u8981\u9ede\uff0c\u638c\u63e1\u6578\u64da\u5b58\u5132\u7684\u57fa\u672c\u539f\u5247\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-186344","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186344","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=186344"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186344\/revisions"}],"predecessor-version":[{"id":186345,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186344\/revisions\/186345"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}