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。
Part 6: Path-based integrity constraints: The goal of this part is to define features similar to WXS's xs: unique, xs: key, and xs: keyref.
第6部分：基于路径的完整性约束(Path - based integrity constraints)：该部分的目的是定义与WXS的xs：unique、xs：key和xs： keyref类似的特性。
Define and apply techniques for assuring data accuracy and integrity such as random sampling, stratified sampling, sample homogeneity, etc.
定义和应用确保数据准确和完整的技巧，如随机抽样法、分层抽样法、样本同质性等。
A Foreign key constraint allows you to define referential integrity between a parent and child table.
外键约束允许您定义父表和子表之间的引用完整性。
It can also facilitate users to define and manipulate data, maintain the security and integrity of data, and the concurrency control and database recovery under multi-user circumstances.
它使用户能方便地进行定义和操纵数据，维护数据的安全性和完整性，以及多用户下的并发控制和恢复数据库等操作。
A foreign key constraint allows you to define referential integrity between a parent and child table.
外部索引键条件约束可让您在父、子资料表之间定义参考整合性。
A foreign key constraint allows you to define referential integrity between a parent and child table.
外部索引键条件约束可让您在父、子资料表之间定义参考整合性。
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