检查点
数据模型概览
了解不同的数据模型如何定义数据的结构和关系。
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A visual representation of a hierarchical model
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A visual depiction of the network model
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The Products table’s FOREIGN KEY (CategoryID) points to the Categories table’s PRIMARY KEY (CategoryID).
代码示例
1{ 2 "OrderID": 1, 3 "OrderDate": "2025-03-01", 4 "TotalAmount": 1200.00, 5 "Customer": { 6 "CustomerID": 1, 7 "CustomerName": "John Doe", 8 "Email": "johndoe@example.com" 9 }, 10 "Items": [ 11 { 12 "ProductID": 1, 13 "ProductName": "Laptop", 14 "Quantity": 1, 15 "Price": 1200.00 16 } 17 ] 18}
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When to use what models
Quiz
单选题
哪种数据模型将数据组织成树状结构，其中每个记录恰好有一个父级？
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