{"id":2032,"date":"2026-07-28T06:14:00","date_gmt":"2026-07-28T06:14:00","guid":{"rendered":"https:\/\/www.vpascode.com\/cn\/docs\/uncategorized\/sql-visualizer-guide\/"},"modified":"2026-07-28T06:14:00","modified_gmt":"2026-07-28T06:14:00","slug":"sql-visualizer-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/cn\/docs\/vpascode-docs\/sql-visualizer-guide\/","title":{"rendered":"SQL"},"content":{"rendered":"

\u5728\u8bbe\u8ba1\u5173\u7cfb\u578b\u6570\u636e\u5e93\u3001\u7ba1\u7406\u8fc1\u79fb\u6216\u5ba1\u8ba1\u8868\u7ed3\u6784\u65f6\uff0c\u9605\u8bfb\u539f\u59cb\u7684DDL\uff08\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff09\u811a\u672c\u53ef\u80fd\u4f1a\u4f7f\u53ef\u89c6\u5316\u5b9e\u4f53\u5173\u7cfb\u53d8\u5f97\u56f0\u96be\u3002\u8be5SQL\u6a21\u5f0f\u53ef\u89c6\u5316\u5de5\u5177<\/strong>\u53ef\u5c06SQL\u8868DDL\u811a\u672c\u8f6c\u6362\u4e3a\u6e05\u6670\u3001\u4ea4\u4e92\u5f0f\u7684\u5b9e\u4f53\u5173\u7cfb\uff08ER\uff09\u56fe\u548c\u8868\u8282\u70b9\u56fe\u3002\u901a\u8fc7\u89e3\u6790\u8868\u5b9a\u4e49\u3001\u5217\u6570\u636e\u7c7b\u578b\u3001\u4e3b\u952e\u548c\u5916\u952e\u7ea6\u675f\uff0c\u6570\u636e\u5e93\u67b6\u6784\u5e08\u548c\u540e\u7aef\u5de5\u7a0b\u5e08\u53ef\u4ee5\u76f4\u89c2\u5730\u6620\u5c04\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u5e76\u4e00\u76ee\u4e86\u7136\u5730\u9a8c\u8bc1\u5173\u7cfb\u5b8c\u6574\u6027\u3002<\/p>\n

SQL\u53ef\u89c6\u5316\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n

\u5728VPasCode\u4e2d\uff0cSQL\u6e32\u67d3\u4f1a\u81ea\u52a8\u89e3\u6790CREATE TABLE<\/code>\u8bed\u53e5\u3001\u5217\u58f0\u660e\u548c\u7ea6\u675f\u5b9a\u4e49\u4e3a\u7ed3\u6784\u5316\u7684\u53ef\u89c6\u5316\u5b9e\u4f53\u8282\u70b9\u3002\u8868\u540d\u4f5c\u4e3a\u7236\u8282\u70b9\uff0c\u5217\u5b9a\u4e49\u4ee5\u5e26\u6709\u6570\u636e\u7c7b\u578b\u7684\u5b57\u6bb5\u5f62\u5f0f\u5217\u51fa\uff0c\u5916\u952e\u5173\u7cfb\u5219\u5728\u76f8\u5173\u5b9e\u4f53\u8282\u70b9\u4e4b\u95f4\u751f\u6210\u8fde\u63a5\u7ebf\u3002<\/p>\n

1. \u57fa\u7840\u8bbe\u7f6e<\/h3>\n

\u8981\u53ef\u89c6\u5316SQL\u6a21\u5f0f\uff0c\u8bf7\u7f16\u5199\u5b9a\u4e49\u8868\u3001\u4e3b\u952e\u548c\u5916\u952e\u5173\u7cfb\u7684\u6807\u51c6DDL\u8bed\u53e5\u3002\u6838\u5fc3\u5173\u7cfb\u6a21\u578b\u5982\u7535\u5b50\u5546\u52a1\u6a21\u5f0f\u5c55\u793a\u4e86\u57fa\u672c\u7684\u5b9e\u4f53\u6620\u5c04\uff1a<\/p>\n

\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n
\n
\r\n
\r\n SQL<\/span>\r\n \r\n <\/path><\/path><\/svg>\r\n Edit SQL in VPasCode<\/span>\r\n <\/a>\r\n <\/div>\r\n
\r\n 
CREATE TABLE users (\r\n  user_id INT PRIMARY KEY,\r\n  email VARCHAR(255) NOT NULL,\r\n  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\r\n);\r\n\r\nCREATE TABLE orders (\r\n  order_id INT PRIMARY KEY,\r\n  user_id INT REFERENCES users(user_id),\r\n  total_amount DECIMAL(10,2) NOT NULL,\r\n  order_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP\r\n);\r\n\r\nCREATE TABLE order_items (\r\n  item_id INT PRIMARY KEY,\r\n  order_id INT REFERENCES orders(order_id),\r\n  product_name VARCHAR(255) NOT NULL,\r\n  price DECIMAL(10,2) NOT NULL,\r\n  quantity INT NOT NULL\r\n);<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit SQL in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u9ad8\u7ea7\u7ed3\u6784\u6280\u672f<\/h2>\n
SQL\u53ef\u89c6\u5316\u5728\u5448\u73b0\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u3001\u591a\u4f5c\u8005\u535a\u5ba2\u5e73\u53f0\u548c\u53d1\u5e03\u5173\u7cfb\u56fe\u65b9\u9762\u8868\u73b0\u51fa\u8272\u3002<\/p>\n
1. \u535a\u5ba2\u4e0e\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u6a21\u5f0f<\/h3>\n
\u901a\u8fc7\u5173\u8054\u4f5c\u8005\u8d26\u6237\u3001\u6587\u7ae0\u3001\u5206\u7c7b\u548c\u8bc4\u8bba\u7ebf\u7a0b\uff0cVPasCode\u53ef\u5c06\u591a\u8868DDL\u811a\u672c\u8f6c\u6362\u4e3a\u5168\u9762\u7684ER\u8282\u70b9\u56fe\uff1a<\/p>\n
\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    SQL<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit SQL in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
CREATE TABLE authors (\r\n  author_id INT PRIMARY KEY,\r\n  username VARCHAR(50) UNIQUE NOT NULL,\r\n  bio TEXT\r\n);\r\n\r\nCREATE TABLE posts (\r\n  post_id INT PRIMARY KEY,\r\n  author_id INT REFERENCES authors(author_id),\r\n  title VARCHAR(200) NOT NULL,\r\n  content TEXT NOT NULL,\r\n  published_at TIMESTAMP\r\n);\r\n\r\nCREATE TABLE comments (\r\n  comment_id INT PRIMARY KEY,\r\n  post_id INT REFERENCES posts(post_id),\r\n  author_name VARCHAR(100) NOT NULL,\r\n  comment_text TEXT NOT NULL,\r\n  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\r\n);<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit SQL in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6784\u5efa\u591a\u79df\u6237\u5e73\u53f0\u4e0eSaaS\u5de5\u4f5c\u533a<\/h2>\n
\u53ef\u89c6\u5316SaaS\u5e73\u53f0\u6a21\u5f0f\u6709\u52a9\u4e8e\u5f00\u53d1\u8005\u6620\u5c04\u591a\u79df\u6237\u9694\u79bb\u3001\u8ba2\u9605\u5c42\u7ea7\u548c\u56e2\u961f\u6210\u5458\u7ed3\u6784\u3002<\/p>\n
1. SaaS\u591a\u79df\u6237\u5e73\u53f0\u6a21\u5f0f<\/h3>\n
\u5b9a\u4e49\u79df\u6237\u8d26\u6237\u3001\u7528\u6237\u8ba2\u9605\u548c\u5de5\u4f5c\u533a\u6210\u5458\u5173\u7cfb\uff0c\u4ee5\u6620\u5c04\u590d\u6742\u7684\u6388\u6743\u548c\u8ba1\u8d39\u6a21\u578b\uff1a<\/p>\n
\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    SQL<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit SQL in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
CREATE TABLE tenants (\r\n  tenant_id INT PRIMARY KEY,\r\n  company_name VARCHAR(100) NOT NULL,\r\n  plan_tier VARCHAR(50) DEFAULT 'free'\r\n);\r\n\r\nCREATE TABLE members (\r\n  member_id INT PRIMARY KEY,\r\n  tenant_id INT REFERENCES tenants(tenant_id),\r\n  full_name VARCHAR(100) NOT NULL,\r\n  role VARCHAR(50) NOT NULL\r\n);\r\n\r\nCREATE TABLE subscriptions (\r\n  subscription_id INT PRIMARY KEY,\r\n  tenant_id INT REFERENCES tenants(tenant_id),\r\n  status VARCHAR(50) NOT NULL,\r\n  renews_at TIMESTAMP NOT NULL\r\n);<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit SQL in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6218\u7565\u6700\u4f73\u5b9e\u8df5<\/h2>\n
    \n
  • \u58f0\u660e\u663e\u5f0f\u5916\u952e\uff1a<\/strong> \u663e\u5f0f\u5305\u542b REFERENCES \u8868(\u5217)<\/code> \u5b50\u53e5\u6216\u6807\u51c6 \u5916\u952e<\/code> \u8bed\u53e5\uff0c\u4ee5\u4fbf\u6e32\u67d3\u5668\u53ef\u4ee5\u81ea\u52a8\u7ed8\u5236\u5b9e\u4f53\u4e4b\u95f4\u7684\u8fde\u63a5\u7ebf\u3002<\/li>\n
  • \u4f7f\u7528\u6807\u51c6\u5217\u7ea6\u675f\uff1a<\/strong> \u660e\u786e\u6307\u5b9a \u4e3b\u952e<\/code>, \u975e\u7a7a<\/code>\uff0c\u4ee5\u53ca \u552f\u4e00<\/code> \u6807\u5fd7\uff0c\u4ee5\u786e\u4fdd\u5c5e\u6027\u5143\u6570\u636e\u5728\u6e32\u67d3\u7684\u8868\u683c\u5361\u7247\u4e2d\u4fdd\u6301\u53ef\u89c1\u3002<\/li>\n
  • \u575a\u6301\u4f7f\u7528\u7b80\u6d01\u7684DDL\u8bed\u53e5\uff1a<\/strong> \u4fdd\u6301\u8bed\u53e5\u805a\u7126\u4e8e\u8868\u7ed3\u6784\uff08\u4f8b\u5982 CREATE TABLE<\/code>\uff09\u800c\u4e0d\u662f\u8fc7\u7a0b\u903b\u8f91\u6216\u539f\u59cb\u6570\u636e\u63d2\u5165\uff0c\u4ee5\u751f\u6210\u7b80\u6d01\u3001\u805a\u7126\u7684\u56fe\u8868\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    \u5728\u8bbe\u8ba1\u5173\u7cfb\u578b\u6570\u636e\u5e93\u3001\u7ba1\u7406\u8fc1\u79fb\u6216\u5ba1\u8ba1\u8868\u7ed3\u6784\u65f6\uff0c\u9605\u8bfb\u539f\u59cb\u7684DDL\uff08\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff09\u811a\u672c…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":10,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","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":"","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":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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