Clearly the use of check constraints has a minor effect on performance, but foreign keys and triggers can be extremely significant.
显然，检查约束的使用对性能有一点小小的影响，但是外键和触发器的影响却非常大。
Businesses need to impose unique constraints on this information even when they use vertical industry standards for exchange.
即使在交换中使用纵向行业标准，企业仍然需要对这些信息应用唯一的约束。
The rewrite phase will use the referential and check constraints defined on the four nicknames to eliminate the join operations and one of the UNION branches.
重写阶段将使用四个昵称上定义的引用约束和检查约束来删除连接操作和一个UNION分支。
You can use similar definitions to define foreign key constraints on usa.item_supplied nickname.
可以使用类似的定义来定义usa . item_supplied昵称上的外键约束。
Obeo: Typically, customers use Obeo Designer to collaborate on the design of complex projects subject to many constraints.
Obeo：通常，用户使用Obeo设计器来协同设计一些受制于很多约束的复杂项目。
On the other hand, OVal's ease of use and wide selection of constraints make it a viable option for adding validation constraints to code with little effort.
从另一方面讲，OVal很容易使用，对约束条件也有很大的选择余地，若想要花少量力气就可向代码添加验证约束条件，它无疑是个上佳之选。
On the other hand, you may choose not to use such constraints at all and rely on your application's code to manage its own data integrity.
另一方面，您可能选择根本不用这样的约束，而依靠应用程序的代码来管理自己的数据完整性。
So, because MakeConnection allows any message targeted to that URI to be sent, it doesn't require additional constraints (like the use of sequences) on the sending endpoint.
因此，由于MakeConnection允许发送任何以该URI为目标的消息，因此并不要求对发送端点施加其他约束(例如，序列的使用)。
Use SQLite documentation for data types supported, constraints, and so on.
查阅SQLite文档获得受支持的数据类型、限制等。
Emmanuel said that JPA 2.0 framework could use the bean validation framework to generate database constraints based on the bean constraint annotations.
Emmanuel说到，JPA 2.0框架可以使用bean校验框架基于bean的约束注解来产生数据库约束。
On the other hand, in the first solution, If you want the top and bottom of the views to align, you must make sure their top and bottom constraints use the same constant value.
另一方面，在第一种方法中，如果想要红蓝视图的上部和底部对齐，你必须确保它们的上部和底部使用了同样的常量值。
Most cloud applications will make heavy use of validation rules on fields, constraints on fields and tables, and workflows on objects.
大多数云应用会大量使用字段内验证规则和系统规定参数、字段和表格限制以及数据集的工作流。
However, due to the resource constraints on sensors, it is infeasible to use traditional key management techniques.
但是由于节点资源的限制，传统的密钥管理方法在传感器网络中并不适用。
Explicit means that the type of concepts used, and the constraints on their use are explicitly defined.
显式意味着所使用的概念的类型，和使用它们的约束是显式定义的。
Meanwhile, in the use of programs based on the analogy proposed reservoir constraints cost-effective index, in order to reflect the indirect benefits of the role of reservoir.
同时，在运用方案类比法的基础上，提出了水库效费比的约束指数，以此来反映水库枢纽工程间接效益的作用。
The DTV middleware is a kind of use of component-based design system technology, it is consistent with DTV system for real-time requirements, as well as on efficiency and resources constraints.
而数字电视中间件作为一种采用组件化设计的软件系统技术，符合数字电视系统对实时性的要求，以及对效率和资源的限制。
In this study, we focus on structural design and use quantifiable objectives and constraints to analyze, evaluate and improve website design.
在该研究中，我们重点放在结构设计和使用可计量的对象和约束去分析，评价和改进网站设计。
Symfony2: How to use constraints on custom compound form type?
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Symfony2: How to use constraints on custom compound form type?
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