... 引用完整性约束 referential integrity constraint 户自定义的完整性约束 define Integrity (完整性约束):防止出现数据库中的数据不一致的约束。 Integrity constaints ...
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XML digital signatures define how to digitally sign part or all of an XML document to guarantee data integrity.
XML数字签名定义了如何对XML文档的部分或全部进行数字签名以保证数据完整性。
But when you define ri constraints, keep in mind that there are rules in place to safeguard data integrity when DML operations are performed against related tables.
但是在您定义RI时,要记住,当对相关表执行dml操作时,需要一些规则来保护数据完整性。
For our second strategy (one table per class hierarchy), you'll have to define your integrity using check constraints.
对于第二个策略(每个类层次结构一个表),您必须用检测约束定义您自己的完整性。
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