{"id":2047,"date":"2026-07-28T06:14:00","date_gmt":"2026-07-28T06:14:00","guid":{"rendered":"https:\/\/www.vpascode.com\/tw\/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\/tw\/docs\/vpascode-docs\/sql-visualizer-guide\/","title":{"rendered":"SQL"},"content":{"rendered":"

\u5728\u8a2d\u8a08\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u3001\u7ba1\u7406\u9077\u79fb\u6216\u5be9\u8a08\u8cc7\u6599\u8868\u7d50\u69cb\u6642\uff0c\u95b1\u8b80\u539f\u59cb\u7684 DDL\uff08\u8cc7\u6599\u5b9a\u7fa9\u8a9e\u8a00\uff09\u7a0b\u5f0f\u78bc\u53ef\u80fd\u6703\u8b93\u5be6\u9ad4\u95dc\u4fc2\u7684\u8996\u89ba\u5316\u8b8a\u5f97\u56f0\u96e3\u3002SQL \u8cc7\u6599\u7d50\u69cb\u8996\u89ba\u5316\u5de5\u5177<\/strong>\u53ef\u5c07 SQL \u8cc7\u6599\u8868 DDL \u7a0b\u5f0f\u78bc\u8f49\u63db\u70ba\u6e05\u6670\u3001\u4e92\u52d5\u5f0f\u7684\u5be6\u9ad4\u95dc\u4fc2\uff08ER\uff09\u5716\u8868\u8207\u8cc7\u6599\u8868\u7bc0\u9ede\u5730\u5716\u3002\u900f\u904e\u89e3\u6790\u8cc7\u6599\u8868\u5b9a\u7fa9\u3001\u6b04\u4f4d\u8cc7\u6599\u985e\u578b\u3001\u4e3b\u8981\u9375\u8207\u5916\u4f86\u9375\u7d04\u675f\uff0c\u8cc7\u6599\u5eab\u67b6\u69cb\u5e2b\u8207\u5f8c\u7aef\u5de5\u7a0b\u5e2b\u80fd\u76f4\u89c0\u5730\u7e6a\u88fd\u8cc7\u6599\u5eab\u7d50\u69cb\uff0c\u4e26\u4e00\u76ee\u4e86\u7136\u5730\u9a57\u8b49\u95dc\u806f\u5b8c\u6574\u6027\u3002<\/p>\n

SQL \u8996\u89ba\u5316\u7684\u904b\u4f5c\u539f\u7406<\/h2>\n

\u5728 VPasCode \u4e2d\uff0cSQL \u6e32\u67d3\u6703\u81ea\u52d5\u89e3\u6790CREATE TABLE<\/code>\u8a9e\u53e5\u3001\u6b04\u4f4d\u5ba3\u544a\u8207\u7d04\u675f\u5b9a\u7fa9\uff0c\u8f49\u63db\u70ba\u7d50\u69cb\u5316\u7684\u8996\u89ba\u5316\u5be6\u9ad4\u7bc0\u9ede\u3002\u8cc7\u6599\u8868\u540d\u7a31\u4f5c\u70ba\u7236\u7bc0\u9ede\uff0c\u6b04\u4f4d\u5b9a\u7fa9\u5247\u4ee5\u8cc7\u6599\u985e\u578b\u7684\u6b04\u4f4d\u5f62\u5f0f\u5217\u51fa\uff0c\u800c\u5916\u4f86\u9375\u95dc\u4fc2\u6703\u5728\u76f8\u95dc\u5be6\u9ad4\u7bc0\u9ede\u4e4b\u9593\u7522\u751f\u9023\u63a5\u7dda\u3002<\/p>\n

1. \u57fa\u672c\u8a2d\u5b9a<\/h3>\n

\u8981\u8996\u89ba\u5316 SQL \u8cc7\u6599\u7d50\u69cb\uff0c\u8acb\u64b0\u5beb\u6a19\u6e96\u7684 DDL \u8a9e\u53e5\uff0c\u5b9a\u7fa9\u8cc7\u6599\u8868\u3001\u4e3b\u8981\u9375\u8207\u5916\u4f86\u9375\u95dc\u4fc2\u3002\u5982\u96fb\u5546\u8cc7\u6599\u7d50\u69cb\u7b49\u6838\u5fc3\u95dc\u806f\u6a21\u578b\uff0c\u80fd\u5c55\u73fe\u57fa\u672c\u7684\u5be6\u9ad4\u5c0d\u61c9\u95dc\u4fc2\uff1a<\/p>\n

\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/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\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u9032\u968e\u7d50\u69cb\u6280\u8853<\/h2>\n
SQL \u8996\u89ba\u5316\u5728\u5448\u73fe\u5167\u5bb9\u7ba1\u7406\u7cfb\u7d71\u3001\u591a\u4f5c\u8005\u90e8\u843d\u683c\u5e73\u53f0\u8207\u767c\u4f48\u95dc\u806f\u5716\u5f62\u65b9\u9762\u8868\u73fe\u51fa\u8272\u3002<\/p>\n
1. \u535a\u5ba2\u8207\u5167\u5bb9\u7ba1\u7406\u7cfb\u7d71\u8cc7\u6599\u7d50\u69cb<\/h3>\n
\u900f\u904e\u9023\u7d50\u4f5c\u8005\u5e33\u6236\u3001\u6587\u7ae0\u3001\u5206\u985e\u8207\u8a55\u8ad6\u4e32\uff0cVPasCode \u53ef\u5c07\u591a\u8cc7\u6599\u8868\u7684 DDL \u7a0b\u5f0f\u78bc\u8f49\u63db\u70ba\u5b8c\u6574\u7684 ER \u7bc0\u9ede\u5716\u8868\uff1a<\/p>\n
\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/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\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u5efa\u69cb\u591a\u79df\u6236\u5e73\u53f0\u8207 SaaS \u5de5\u4f5c\u7a7a\u9593<\/h2>\n
\u8996\u89ba\u5316 SaaS \u5e73\u53f0\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u6709\u52a9\u65bc\u958b\u767c\u8005\u898f\u5283\u591a\u79df\u6236\u9694\u96e2\u3001\u8a02\u95b1\u7b49\u7d1a\u8207\u5718\u968a\u6210\u54e1\u7d50\u69cb\u3002<\/p>\n
1. SaaS \u591a\u79df\u6236\u5e73\u53f0\u8cc7\u6599\u7d50\u69cb<\/h3>\n
\u5b9a\u7fa9\u79df\u6236\u5e33\u6236\u3001\u4f7f\u7528\u8005\u8a02\u95b1\u8207\u5de5\u4f5c\u7a7a\u9593\u6210\u54e1\u8cc7\u683c\uff0c\u4ee5\u5efa\u7acb\u8907\u96dc\u7684\u6388\u6b0a\u8207\u8a08\u8cbb\u6a21\u578b\uff1a<\/p>\n
\n
\nSQL<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/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\u5728 VPasCode \u4e2d\u7de8\u8f2f SQL<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6230\u7565\u6700\u4f73\u5be6\u52d9<\/h2>\n
    \n
  • \u660e\u78ba\u5ba3\u544a\u5916\u9375\uff1a<\/strong> \u5305\u542b\u660e\u78ba\u7684 REFERENCES table(column)<\/code> \u5b50\u53e5\u6216\u6a19\u6e96 FOREIGN KEY<\/code>\u9673\u8ff0\u5f0f\uff0c\u8b93\u6e32\u67d3\u5668\u80fd\u81ea\u52d5\u7e6a\u88fd\u5be6\u9ad4\u4e4b\u9593\u7684\u9023\u63a5\u7dda\u3002<\/li>\n
  • \u4f7f\u7528\u6a19\u6e96\u6b04\u4f4d\u7d04\u675f\uff1a<\/strong> \u6e05\u695a\u6307\u5b9a PRIMARY KEY<\/code>, NOT NULL<\/code>\uff0c\u4ee5\u53ca UNIQUE<\/code>\u65d7\u6a19\uff0c\u4ee5\u78ba\u4fdd\u5c6c\u6027\u5143\u8cc7\u6599\u5728\u6e32\u67d3\u5f8c\u7684\u8cc7\u6599\u8868\u5361\u7247\u4e2d\u4ecd\u53ef\u898b\u3002<\/li>\n
  • \u5805\u6301\u4f7f\u7528\u4e7e\u6de8\u7684 DDL \u9673\u8ff0\u5f0f\uff1a<\/strong> \u4fdd\u6301\u9673\u8ff0\u5f0f\u5c08\u6ce8\u65bc\u8cc7\u6599\u8868\u7d50\u69cb\uff08\u4f8b\u5982 CREATE TABLE<\/code>\uff09\u800c\u975e\u7a0b\u5e8f\u908f\u8f2f\u6216\u539f\u59cb\u8cc7\u6599\u63d2\u5165\uff0c\u4ee5\u7522\u751f\u4e7e\u6de8\u3001\u805a\u7126\u7684\u5716\u8868\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    \u5728\u8a2d\u8a08\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u3001\u7ba1\u7406\u9077\u79fb\u6216\u5be9\u8a08\u8cc7\u6599\u8868\u7d50\u69cb\u6642\uff0c\u95b1\u8b80\u539f\u59cb\u7684 DDL\uff08\u8cc7\u6599\u5b9a\u7fa9\u8a9e\u8a00…<\/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 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