... Constraints Defined in Dialog Box】（约束定义）图标 Constraint Definition】（约束定义）的对话框。如图 Length】（长度）、【 ...
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unique constraint definition 唯一性约束定义
While we do not reuse the actual constraint implementation, the metadata API offers some ways to extract the constraint definition and reuse it.
尽管我们不会重用实际的约束实现，但是元数据api提供一些方法来提取约束定义并重用它。
Security constraints are consistent by modifying security constraint definition, and an effective classification assignment algorithm is given in this paper.
通过修改安全约束的定义，使得安全约束之间始终是协调的，并给出一种高效的密级分配算法；
The CHECK constraint is perfect for this, as the following table definition shows.
CHECK 约束非常适合执行此项操作，如以下所示表定义。
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