{"id":2104,"date":"2026-05-26T08:05:43","date_gmt":"2026-05-26T08:05:43","guid":{"rendered":"https:\/\/www.vpascode.com\/cn\/docs\/uncategorized\/mermaid-js-erd-syntax-guide\/"},"modified":"2026-05-26T08:05:43","modified_gmt":"2026-05-26T08:05:43","slug":"mermaid-js-erd-syntax-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/cn\/docs\/vpascode-docs\/mermaid-js-erd-syntax-guide\/","title":{"rendered":"Mermaid.js ERD \u8bed\u6cd5\u6307\u5357"},"content":{"rendered":"<h2>\u4ec0\u4e48\u662f\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\uff1f<\/h2>\n<p>\u4e00\u4e2a<strong>\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09<\/strong>\u662f\u4e00\u79cd\u7528\u4e8e\u8bbe\u8ba1\u3001\u6587\u6863\u5316\u548c\u5206\u6790\u5173\u7cfb\u6570\u636e\u5e93\u6a21\u5f0f\u7684\u7ed3\u6784\u84dd\u56fe\u3002\u5b83\u6982\u8ff0\u4e86\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u7279\u5b9a\u6570\u636e\u8868\uff08\u5b9e\u4f53\uff09\u3001\u5d4c\u5957\u5728\u8fd9\u4e9b\u8868\u4e2d\u7684\u5217\uff08\u5c5e\u6027\uff09\uff0c\u4ee5\u53ca\u5c06\u5b83\u4eec\u8054\u7cfb\u5728\u4e00\u8d77\u7684\u5f15\u7528\u5b8c\u6574\u6027\u89c4\u5219\u3002\u4f7f\u7528\u6807\u51c6<strong>\u4fe1\u606f\u5de5\u7a0b\uff08IE\uff09\u7b26\u53f7<\/strong>\uff0c\u5b83\u4f7f\u7528\u6e05\u6670\u7684<strong>\u4e4c\u9e26\u8db3\u7b26\u53f7<\/strong>\u7b26\u53f7\u5934\u6765\u8868\u793a\u6570\u636e\u7ea6\u675f\u548c\u591a\u8868\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n<p>\u4f7f\u7528<strong>Mermaid.js<\/strong>\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u7b80\u6d01\u7684\u58f0\u660e\u5f0f\u6587\u672c\u5757\u6765\u5b9a\u4e49\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u8868\u7d22\u5f15\u3001\u6570\u636e\u7c7b\u578b\u548c\u5916\u952e\u8fde\u63a5\u3002\u5f15\u64ce\u4f1a\u81ea\u52a8\u5904\u7406\u591a\u5217\u5e03\u5c40\u5bb9\u5668\u7684\u5c3a\u5bf8\uff0c\u5e76\u8def\u7531\u8fde\u63a5\u7ebf\uff0c\u800c\u4e0d\u4f1a\u8ba9\u6587\u672c\u6807\u7b7e\u91cd\u53e0\u3002<\/p>\n<h2>\u6838\u5fc3\u8bed\u6cd5\u6307\u5357\uff1a\u5143\u7d20\u4e0e\u7ed3\u6784<\/h2>\n<p>\u5728 Mermaid \u4e2d\u6784\u5efa\u4e00\u4e2a\u6709\u6548\u4e14\u53ef\u5b8c\u5168\u8fd0\u884c\u7684\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u4f9d\u8d56\u4e8e\u7ed3\u6784\u5316\u7684\u5b9e\u4f53\u5757\u3001\u6570\u636e\u7c7b\u578b\u6620\u5c04\u3001\u7d22\u5f15\u6807\u7b7e\u548c\u57fa\u6570\u8fd0\u7b97\u7b26\u3002<\/p>\n<h3>1. \u58f0\u660e\u5b9e\u4f53\u548c\u8868\u5217<\/h3>\n<p>\u4f60\u53ef\u4ee5\u5728\u7b2c\u4e00\u884c\u4f7f\u7528<code>erDiagram<\/code>\u5173\u952e\u5b57\u6765\u521d\u59cb\u5316 ERD \u753b\u5e03\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u8868\uff0c\u8bf7\u5199\u51fa\u5b9e\u4f53\u540d\u79f0\uff0c\u540e\u8ddf\u4e00\u4e2a\u5de6\u5927\u62ec\u53f7\uff0c\u5c06\u5217\u914d\u7f6e\u6309\u987a\u5e8f\u9010\u884c\u5217\u51fa\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghWoIBwQy80oUMlMQ\/OKSosy8dIXU3MTMHIRoSWZuanFJYm6BQnJRamJJakp8YglEthYAu7UZoQ==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghWoIBwQy80oUMlMQ\/OKSosy8dIXU3MTMHIRoSWZuanFJYm6BQnJRamJJakp8YglEthYAu7UZoQ==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">erDiagram\r\n    USERS {\r\n        int id\r\n        string email\r\n        timestamp created_at\r\n    }<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghWoIBwQy80oUMlMQ\/OKSosy8dIXU3MTMHIRoSWZuanFJYm6BQnJRamJJakp8YglEthYAu7UZoQ==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghWoIBwQy80oUMlMQ\/OKSosy8dIXU3MTMHIRoSWZuanFJYm6BQnJRamJJakp8YglEthYAu7UZoQ==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"VkXootV\"><img alt=\"\" class=\"alignnone size-full wp-image-629\" decoding=\"async\" height=\"187\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903a383fb3.png\" width=\"221\"\/><\/p>\n<h3>2. \u6807\u8bb0\u4e3b\u952e\u3001\u5916\u952e\u548c\u6ce8\u91ca<\/h3>\n<p>Mermaid \u7684 ERD \u5f15\u64ce\u5141\u8bb8\u4f60\u5728\u5217\u540d\u548c\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e4b\u540e\u76f4\u63a5\u5206\u914d\u7ed3\u6784\u5316\u7d22\u5f15\u6807\u7b7e\u3002\u4f60\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5c06\u6587\u672c\u7528\u53cc\u5f15\u53f7\u5305\u88f9\uff0c\u4e3a\u5217\u6dfb\u52a0\u53ef\u9009\u7684\u6ce8\u91ca\uff1a<\/p>\n<ul>\n<li><code>PK<\/code> \u2014 \u660e\u786e\u6807\u8bb0\u4e00\u5217\u4e3a\u8868\u7684\u4e3b\u952e\u3002<\/li>\n<li><code>FK<\/code> \u2014 \u6807\u8bb0\u4e00\u5217\u4e3a\u4e0e\u7236\u8868\u5173\u8054\u7684\u5916\u952e\u3002<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAv8gF9egYIVqCA8EMvNKFDJTFAK8UYVKi1OL4oHibt4KSj6ZednFCiX5CqHBQM16mSlKCLXFJUWZeekKyfmlBfl58cn5KakQuVoAct0gOw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAv8gF9egYIVqCA8EMvNKFDJTFAK8UYVKi1OL4oHibt4KSi8n73vWt\/Rpx4bQYKBmvcwUJYTa4pKizLx0heT80oL8vPjk\/JRUiFwtABSTI4c=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">erDiagram\r\n    ORDERS {\r\n        int id PK\r\n        int user_id FK \"\u94fe\u63a5\u5230USERS.id\"\r\n        string coupon_code\r\n    }<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAv8gF9egYIVqCA8EMvNKFDJTFAK8UYVKi1OL4oHibt4KSi8n73vWt\/Rpx4bQYKBmvcwUJYTa4pKizLx0heT80oL8vPjk\/JRUiFwtABSTI4c=\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAv8gF9egYIVqCA8EMvNKFDJTFAK8UYVKi1OL4oHibt4KSj6ZednFCiX5CqHBQM16mSlKCLXFJUWZeekKyfmlBfl58cn5KakQuVoAct0gOw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728VPasCode\u4e2d\u7f16\u8f91Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"aCCwRBw\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-632\" decoding=\"async\" fetchpriority=\"high\" height=\"817\" sizes=\"(max-width: 268px) 100vw, 268px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451.png 268w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451-98x300.png 98w\" width=\"268\"\/><\/p>\n<h3>3. \u638c\u63e1\u4e4c\u9e26\u8db3\u57fa\u6570\u4fee\u9970\u7b26<\/h3>\n<p>\u4e3a\u4e86\u8fde\u63a5\u8868\u5e76\u5f3a\u5236\u5b9e\u65bd\u5f15\u7528\u5b8c\u6574\u6027\u89c4\u5219\uff0c\u8bf7\u4f7f\u7528\u4e13\u7528\u7684\u7ebf\u64cd\u4f5c\u7b26\u6765\u6620\u5c04\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u5b57\u7b26\u5934\u5f62\u6210\u89c6\u89c9\u4e0a\u7684\u4e4c\u9e26\u8db3\u5f62\u72b6\uff0c\u7528\u4ee5\u5b9a\u4e49\u6570\u636e\u591a\u91cd\u6027\u7ea6\u675f\uff1a<\/p>\n<ul>\n<li><code>||--||<\/code> **\u4e00\u5bf9\u4e00\uff1a** \u4e25\u683c\u7684\u3001\u5f3a\u5236\u6027\u76841:1\u6620\u5c04\u3002<\/li>\n<li><code>||--o|<\/code> **\u4e00\u5bf9\u4e00\uff08\u53ef\u9009\uff09\uff1a** \u53ef\u9009\u7684\u4e00\u5bf9\u4e00\u4f9d\u8d56\u5173\u7cfb\u3002<\/li>\n<li><code>||--|{<\/code> **\u4e00\u5bf9\u591a\uff08\u5f3a\u5236\uff09\uff1a** \u5f3a\u5236\u7684\u4e00\u5bf9\u591a\u7236\u7ea7\u5173\u8054\u3002<\/li>\n<li><code>||--o{<\/code> **\u4e00\u5bf9\u591a\uff08\u53ef\u9009\uff09\uff1a** \u6807\u51c6\u7684\u3001\u53ef\u9009\u7684\u4e00\u5bf9\u591a\u5173\u7cfb\u3002<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghZoaXd38agX\/IBcQz0pBqSAnMTm1WAkAMZMNNw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728VPasCode\u4e2d\u7f16\u8f91Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghZoaXd38agX\/IBcQz0pB6cmO7qe9U5UAOh0O7Q==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">erDiagram\r\n    USERS ||--o{ ORDERS : \"\u4e0b\u5355\" <\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghZoaXd38agX\/IBcQz0pB6cmO7qe9U5UAOh0O7Q==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAgtBg16BghZoaXd38agX\/IBcQz0pBqSAnMTm1WAkAMZMNNw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728VPasCode\u4e2d\u7f16\u8f91Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p><img alt=\"\" class=\"alignnone size-full wp-image-631\" decoding=\"async\" height=\"285\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903aca991c.png\" width=\"116\"\/><\/p>\n<h2>\u5173\u7cfb\u578b\u6570\u636e\u6a21\u5f0f\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<ul>\n<li><strong>\u4fdd\u6301\u8868\u540d\u5927\u5c0f\u5199\u4e00\u81f4\uff1a<\/strong> \u4fdd\u6301\u5b9e\u4f53\u540d\u79f0\u53ef\u9884\u6d4b\u3002\u4f7f\u7528\u5927\u5199\u5b57\u7b26\u4e32\uff08\u4f8b\u5982\uff0c<code>USER_ACCOUNTS<\/code>\uff09\u6216\u4e25\u683c\u7684\u5c0f\u5199\u86c7\u5f62\u547d\u540d\u6cd5\uff08\u4f8b\u5982\uff0c<code>user_accounts<\/code>\uff09\u4ee5\u5339\u914d\u60a8\u5b9e\u9645\u7684SQL\u57fa\u7840\u8bbe\u65bd\u4ee3\u7801\u3002<\/li>\n<li><strong>\u59cb\u7ec8\u5305\u542b\u6570\u636e\u7c7b\u578b\uff1a<\/strong> \u907f\u514d\u5728\u6ca1\u6709\u7c7b\u578b\u7684\u60c5\u51b5\u4e0b\u58f0\u660e\u539f\u59cb\u5217\u6587\u672c\u3002\u660e\u786e\u5217\u51fa\u5982<code>int<\/code>, <code>varchar<\/code>\uff0c\u6216<code>boolean<\/code> \u786e\u4fdd\u60a8\u7684\u67b6\u6784\u56fe\u8868\u4f5c\u4e3a\u51c6\u786e\u7684\u6280\u672f\u53c2\u8003\u3002<\/li>\n<li><strong>\u4fdd\u6301\u5173\u7cfb\u6807\u7b7e\u4e3a\u52a8\u8bcd\uff1a<\/strong> \u5728\u8fde\u63a5\u5143\u7d20\u65f6\uff0c\u5728\u5173\u7cfb\u5206\u914d\u4e2d\u63d0\u4f9b\u4e00\u4e2a\u7b80\u77ed\u7684\u3001\u5c0f\u5199\u7684\u4e3b\u52a8\u52a8\u8bcd\u5b57\u7b26\u4e32\uff08\u4f8b\u5982\uff0c<code>||--o{ : \"\u5305\u542b\"<\/code>) \u4ee5\u8bb0\u5f55\u4e1a\u52a1\u903b\u8f91\u6620\u5c04\u3002<\/li>\n<\/ul>\n<h2>\u73b0\u5b9e\u4e16\u754c\u7684 Mermaid.js ERD \u793a\u4f8b<\/h2>\n<h3>\u793a\u4f8b 1\uff1a\u6838\u5fc3\u7535\u5b50\u5546\u52a1\u4e8b\u52a1\u6a21\u578b\uff08\u952e\u4e0e\u6620\u5c04\uff09<\/h3>\n<p>\u6b64\u529f\u80fd\u84dd\u56fe\u6a21\u62df\u4e86\u6838\u5fc3\u7535\u5b50\u5546\u52a1\u6570\u636e\u5e93\u4e8b\u52a1\u5faa\u73af\uff0c\u5c55\u793a\u4e86\u7528\u6237\u3001\u8ba2\u5355\u548c\u652f\u4ed8\u8ddf\u8e2a\u7cfb\u7edf\u5982\u4f55\u901a\u8fc7\u4e25\u683c\u7684\u4e4c\u9e26\u811a\u7ea6\u675f\u76f8\u4e92\u8fde\u63a5\u3002<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNqNkM0KwjAQhO+C7xB69wW8iVURfyptPYelXWuwSSS7RcT67qZU8aeC7inMJJlvB12ooHCg+z3hZ7xN0mg1iRNxaYVmlGGhcrFZPCVip0whUIMqO+oRiE7W5XIPtG\/da7\/XHqI4\/P17I2UVsdXopPemL16OmdJQCrYMpQRtK8MdAmLgij6i03i0TkbjdB6t5XISzv7j8Ht0Ie4xDnfo0GQo2R7QdPwCGE9w\/uB4dlzXg4G9PDoZiuBYQoYUvFXVXKrrr\/T+RYEGnY+h4Aa9SHin\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAufQ4BB\/X9egYIVqiAAIZOaVKGSmKAR4I4SKS4oy89IVUnMTM3MwRAsSi4vL84tS4jMSizMgsrW8XBCGf5ALYdNBQsmlxSX5ualF8UA5NyS5lNTkzNzEHIWS\/JLEnPjE3PzSvBIMFxSXJJaUFqNZHRLk6Bfs6Bzi6e8X7+Pq4k6cO4D+wHQE1Jqi1LTUotS85NT4kvzs1DwM+fTEktTyxEo0dyDCuKZGVze\/GhYmVgpKT3Z0P+2dqoQSVCBFNTVYXQ\/U8XzK\/GcdE5QAufJ6tw==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">erDiagram\r\n    CUSTOMERS {\r\n        int id PK\r\n        string email\r\n        string password_hash\r\n    }\r\n\r\n    ORDERS {\r\n        int id PK\r\n        int customer_id FK\r\n        decimal total_amount\r\n        string status\r\n    }\r\n\r\n    TRANSACTION_LEDGERS {\r\n        int id PK\r\n        int order_id FK\r\n        string reference_token\r\n        string gateway\r\n    }\r\n\r\n    CUSTOMERS ||--o{ ORDERS : \"\u4e0b\u5355\"\r\n    ORDERS ||--|| TRANSACTION_LEDGERS : \"\u751f\u6210\" <\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAAufQ4BB\/X9egYIVqiAAIZOaVKGSmKAR4I4SKS4oy89IVUnMTM3MwRAsSi4vL84tS4jMSizMgsrW8XBCGf5ALYdNBQsmlxSX5ualF8UA5NyS5lNTkzNzEHIWS\/JLEnPjE3PzSvBIMFxSXJJaUFqNZHRLk6Bfs6Bzi6e8X7+Pq4k6cO4D+wHQE1Jqi1LTUotS85NT4kvzs1DwM+fTEktTyxEo0dyDCuKZGVze\/GhYmVgpKT3Z0P+2dqoQSVCBFNTVYXQ\/U8XzK\/GcdE5QAufJ6tw==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNqNkM0KwjAQhO+C7xB69wW8iVURfyptPYelXWuwSSS7RcT67qZU8aeC7inMJJlvB12ooHCg+z3hZ7xN0mg1iRNxaYVmlGGhcrFZPCVip0whUIMqO+oRiE7W5XIPtG\/da7\/XHqI4\/P17I2UVsdXopPemL16OmdJQCrYMpQRtK8MdAmLgij6i03i0TkbjdB6t5XISzv7j8Ht0Ie4xDnfo0GQo2R7QdPwCGE9w\/uB4dlzXg4G9PDoZiuBYQoYUvFXVXKrrr\/T+RYEGnY+h4Aa9SHin\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"qqEcCcA\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-632\" decoding=\"async\" fetchpriority=\"high\" height=\"817\" sizes=\"(max-width: 268px) 100vw, 268px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451.png 268w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903b8be451-98x300.png 98w\" width=\"268\"\/><\/p>\n<p><strong>\u8bed\u6cd5\u5206\u89e3\uff1a<\/strong> \u6b64\u6a21\u5f0f\u6e05\u6670\u5730\u6620\u5c04\u4e86\u4e8b\u52a1\u8fb9\u754c\u3002\u6620\u5c04\u89c4\u5219\u89c4\u5b9a\uff0c\u5ba2\u6237\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u53ef\u4ee5\u4e0b\u96f6\u4e2a\u6216\u591a\u4e2a\u8ba2\u5355\uff08<code>||--o{<\/code>\uff09\uff0c\u800c\u5355\u4e2a\u8ba2\u5355\u8bb0\u5f55\u5fc5\u987b\u751f\u6210\u6070\u597d\u4e00\u4e2a\u5339\u914d\u7684\u4ea4\u6613\u8d26\u672c\u6761\u76ee\uff08<code>||--||<\/code>).<\/p>\n<h3>\u793a\u4f8b 2\uff1a\u4f01\u4e1a\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u6a21\u5f0f\uff08\u591a\u5bf9\u591a\u4ea4\u96c6\uff09<\/h3>\n<p>\u6b64\u9ad8\u7ea7\u6570\u636e\u5e93\u84dd\u56fe\u63cf\u7ed8\u4e86\u5185\u5bb9\u7ba1\u7406\u5e73\u53f0\u7684\u67b6\u6784\u3002\u5b83\u8be6\u7ec6\u8bf4\u660e\u4e86\u5982\u4f55\u901a\u8fc7\u5f15\u5165\u663e\u5f0f\u7684\u6865\u63a5\u6620\u5c04\u5b9e\u4f53\u6765\u89e3\u51b3\u590d\u6742\u7684\u591a\u5bf9\u591a\u914d\u7f6e\u3002<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNqNkU1uwjAQhfdI3GHEulygO9QGhFBIRNh0ZU0d14wU25E9SCDo3RuTtjQ1FZ2VPT9+\/t4o\/0yoPZrxCLooi2pbwam\/xCDLQDWUq2sqsCergYkblWRDs9fXJKsDw6urj0I6y8pyX3ofj\/rD02ybLYrNMvunpkWTStYqSE8tk7O\/no804lPjReSzslyuF4lU6wKLi94DzFfDmkRW2vnjrTqTUYHRtIAhkLaqFpgAFnmere9a+vMb8xQb97xzXgzpL95KZ0xnq4ge34Cv4HyeTt3pLyceYRIXg2TDJNnI\/dEmgr+R+hoeSH6jd53IjHLX9X0AN3qkJw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAggD\/4JBghWoIBwQy80oUMlMUArwRQsUlRZl56QolmSU5qRiixTml6QjBktSKEoWk\/JTK+OT8vJLUvBKIVC0vF4Th7Bji6u4f5OlKpJ15ibmYVqakFicXZRaUZObnoRkP8k081I7IeF\/HgABPP3cMqwryi0viwfbpKLh5o8olJ5akpucXVWKTL8nMTS0uScwtUEgsLs5Mz0tNiU\/E8KC\/r6+rH8EgRXaGG6a3E0tLMvKL4lF9Dw7b5PzcXGCwxoPCGIvngxVqanR186txhYSVgtLTntanE1YrYcQHYY0dbc837lbCYhnc00BVL2e2PO1aoAQA3Silxg==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">erDiagram\r\n    POSTS {\r\n        int id PK\r\n        string title\r\n        string slug\r\n        text body_content\r\n    }\r\n\r\n    CATEGORIES {\r\n        int id PK\r\n        string name\r\n        string description\r\n    }\r\n\r\n    POST_CATEGORY_MAPPINGS {\r\n        int post_id PK, FK\r\n        int category_id PK, FK\r\n        timestamp assigned_at\r\n    }\r\n\r\n    COMMENTS {\r\n        int id PK\r\n        int post_id FK\r\n        string author_name\r\n        text comment_body\r\n    }\r\n\r\n    POSTS ||--o{ POST_CATEGORY_MAPPINGS : \"\u5305\u542b\"\r\n    CATEGORIES ||--o{ POST_CATEGORY_MAPPINGS : \"\u5206\u7c7b\"\r\n    POSTS ||--o{ COMMENTS : \"\u9644\u52a0\" <\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNpLLXLJTEwvSszl5VIAggD\/4JBghWoIBwQy80oUMlMUArwRQsUlRZl56QolmSU5qRiixTml6QjBktSKEoWk\/JTK+OT8vJLUvBKIVC0vF4Th7Bji6u4f5OlKpJ15ibmYVqakFicXZRaUZObnoRkP8k081I7IeF\/HgABPP3cMqwryi0viwfbpKLh5o8olJ5akpucXVWKTL8nMTS0uScwtUEgsLs5Mz0tNiU\/E8KC\/r6+rH8EgRXaGG6a3E0tLMvKL4lF9Dw7b5PzcXGCwxoPCGIvngxVqanR186txhYSVgtLTntanE1YrYcQHYY0dbc837lbCYhnc00BVL2e2PO1aoAQA3Silxg==\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNqNkU1uwjAQhfdI3GHEulygO9QGhFBIRNh0ZU0d14wU25E9SCDo3RuTtjQ1FZ2VPT9+\/t4o\/0yoPZrxCLooi2pbwam\/xCDLQDWUq2sqsCergYkblWRDs9fXJKsDw6urj0I6y8pyX3ofj\/rD02ybLYrNMvunpkWTStYqSE8tk7O\/no804lPjReSzslyuF4lU6wKLi94DzFfDmkRW2vnjrTqTUYHRtIAhkLaqFpgAFnmere9a+vMb8xQb97xzXgzpL95KZ0xnq4ge34Cv4HyeTt3pLyceYRIXg2TDJNnI\/dEmgr+R+hoeSH6jd53IjHLX9X0AN3qkJw==\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"NkBriQB\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-633\" decoding=\"async\" height=\"545\" loading=\"lazy\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903d115d5e.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903d115d5e.png 709w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903d115d5e-300x231.png 300w\" width=\"709\"\/><\/p>\n<p><strong>\u8bed\u6cd5\u5206\u89e3\uff1a<\/strong> \u4e3a\u5904\u7406 `POSTS` \u548c `CATEGORIES` \u4e4b\u95f4\u7684\u591a\u5bf9\u591a\u5173\u7cfb\uff0c\u811a\u672c\u5f15\u5165\u4e86\u4e00\u4e2a\u4ea4\u96c6\u8868\uff08`POST_CATEGORY_MAPPINGS`\uff09\u3002\u6b64\u6620\u5c04\u6846\u4f7f\u7528\u590d\u5408\u952e\uff0c\u540c\u65f6\u4f5c\u4e3a\u4e3b\u952e\u548c\u5916\u952e\uff08<code>PK FK<\/code>\uff09\uff0c\u901a\u8fc7\u6807\u51c6\u7684\u4e00\u5bf9\u591a\u4e4c\u9e26\u811a\u8fde\u63a5\u5c06\u5916\u90e8\u8282\u70b9\u8fde\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\uff1f \u4e00\u4e2a\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u8bbe\u8ba1\u3001\u6587\u6863\u5316\u548c\u5206&#8230;<\/p>\n","protected":false},"author":4,"featured_media":2105,"parent":0,"menu_order":4,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"ld_collection":[14],"class_list":["post-2104","ld_docs","type-ld_docs","status-publish","has-post-thumbnail","hentry","ld_collection-vpascode-docs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mermaid ERD Diagram Syntax | VPasCode Text to Diagram Guide<\/title>\n<meta name=\"description\" content=\"Draft database schemas effortlessly using Mermaid entity relationship diagrams in VPasCode, your text to diagram tool.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vpascode.com\/cn\/docs\/vpascode-docs\/mermaid-js-erd-syntax-guide\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" 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