某些资料库有不同的检查条件约束功能。
Some databases have different functionality for check constraints.
如需资料库如何使用检查条件约束的详细资讯，请参阅资料库文件。
Consult your database documentation for details about how your database works with check constraints.
检查条件约束可指定在资料表中为一或多个资料行所接受的资料值或格式。
A check constraint specifies the data values or formats that are acceptable in one or more columns in a table.
如果所产生的资料未满足资料行上的检查条件约束，当您执行计划时会失败。
If the data that is generated does not satisfy a check constraint on a column, the plan fails when you run it.
例如，如果您的资料库有一个资料行具有参考另一个资料行的检查条件约束，您可能会想要建立自订资料产生器。
For example, you might want to create a custom data generator if your database contains a column that has a check constraint that references another column.
然而，这种效力往往受到时间约束条件的限制，导致以下这种情况的出现：代码复查和检查或者是不被执行，或者是很少被执行。
However, the effectiveness is often limited because of time constraints, leading to a situation where code reviews and inspections are either not conducted or are conducted infrequently.
惟一的区别在于，这种约束只检查验证条件，并不会进行实际的验证。
The only difference here is that this constraint only checks for the validation condition and does not actually do the validation.
我们建立一定的时间表、约束条件、检查点，和通信程序，但我们将细节留给第三方。
We establish certain timetables, constraints, checkpoints, and communication procedures; but we leave the details to the third party.
通过标注指定这个约束条件意味着我的代码不再会被重复的条件弄得乱七八糟，这些条件检查null 值，并且一旦找到该值就会抛出异常。
Specifying this constraint through annotations means I no longer need to litter my code with repetitive conditionals that check for null and throw an exception on finding it.
在既定的约束条件下，着重研究了各具体参数，如资产风险水平、监管检查频率等对银行行为的影响。
There we study how several parameters, such as asset risk value, the frequency of regulation audit and so on, have their influence on banks' risk-taking behavior while some constraints are given.
网络控制技术是在一定的约束条件下，按既定的目标对网络计划进行不断检查、评价、调整和完善的过程。
The network control technology is a course of continuously inspecting, evaluating, adjusting and perfecting the network plan in accordance with the set objective in a certain restrain condition.
安全性约束在该方法中的条件来计算脱线和上线过载限制检查。
In this method conditions for security constraints are calculated off-line and overload limits are checked on-line.
可创建简单的约束表达式，用简单条件检查数据；
You can create a simple constraint expression to check data for a simple condition;
可创建简单的约束表达式，用简单条件检查数据；
You can create a simple constraint expression to check data for a simple condition;
应用推荐