完整性約束表現在三個方面

原創 petrie 2020-06-30 15:05

完整性約束表現在三個方面
　　域的完整性：用Check來實現約束，在數據庫設計工具中，對字段的取值範圍進行定義時，有一個Ch

eck按鈕，通過它定義字段的值城。
　　參照完整性：用PK、FK、表級觸發器來實現。
　　用戶定義完整性：它是一些業務規則，用存儲過程和觸發器來實現。

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