In this syntax example, you must either define a new column or define a new table-level constraint.
在这个语法示例中，必须定义一个新列或者定义一个表级约束。
A class level constraint has access to the bean instance rather than one of its properties and applies some constraint logic based on several properties.
类级别的约束能获取Bean实例，而不是它的某一属性，还能应用一些基于若干属性的约束。
Two-echelon inventory problem with service level constraint and unknown distribution function was analyzed when controllable lead time was sensitive to order quantity.
研究了基于服务水平约束的提前期内需求分布函数未知和可控提前期对订货批量敏感条件下的两级库存优化问题。
The itemNumber column provides a unique identity for each item (or row) and has an attached column-level constraint that enforces a valid value to always be supplied (NOT NULL).
itemNumber列提供了每个商品（或列）的惟一标识，它上面还有列级约束，强制要求提供正确的值（NOT NULL）。
Validate data: statement hooks let you validate parameter data before statement execution, providing the opportunity to do constraint check and data validation at the application level.
验证数据：通过语句钩子可以在执行语句之前验证参数数据，从而为应用程序级的约束检查和数据验证提供机会。
This maintains the greatest level of efficiency within the constraint of multiple databases.
这在多数据库的限制下实现了最大程度的效率。
You may have another constraint anyway: if the new LPAR will be using the latest level of AIX, the NIM server might need to be upgraded first.
可能还有另一个障碍：如果新的LPAR要使用最新级别的AIX，可能需要先升级NIM服务器。
Transformation rules at the attribute level, documented using Object Constraint Language (OCL).
属性级的转换规则，用目标约束语言（Object Constraint language，OCL）编制而成。
This system can realize the detection of the non-rigid moving object and the estimation of the background velocity through the Level-Set method and piece-wise smooth motion field constraint.
该系统采用水平集方法，利用分段平滑运动场的约束条件，实现非刚体运动目标检测和背景的运动估算。
The IBIS model is used to help get exact information in the integrity constraint design of system board level or multiple board level signals for analysis and calculation.
IBIS模型可以帮助设计者在系统板级或多板信号完整性约束的设计中获取准确的信息，以进行分析和计算。
The permission propagation constraint improves the access control grain. It makes the grain reach element or attribute level.
权限传递约束提高了访问控制的粒度，使得访问控制的粒度能够达到元素或属性级。
At present, situation and level of reputation of professional managers which is in need of improvement and constraint enhanced in China is in a status of irregularity.
目前中国职业经理人声誉的现状与水平处于一种参差不齐、鱼目混珠的状态，亟需完善和增强约束。
Do not define constraints in generic interfaces. Interface level-constraint can often be replaced by strong-typing.
泛型接口不要定义限制。接口层的限制通常能用强类型代替。
The results showed that the current constraint on China's women's volleyball team competitive level of non-technical factors are: the formation of teams a short time, running-less;
结果表明，当前制约中国女排竞技水平的非技术因素有：队伍的组建时间短、磨合少；
Under time and area constraint, this method studies the testability and low power by way of high-level scheduling and module allocating.
该方法在时间和面积约束下，通过高层次调度和模块分配，对可测性和低功耗问题进行研究。
Under time and area constraint, this method studies the testability and low power by way of high-level scheduling and module allocating.
该方法在时间和面积约束下，通过高层次调度和模块分配，对可测性和低功耗问题进行研究。
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