Null and default value Compression (V8 GA) : Compression for null, zero length data in variable length columns and system default value.
null值和缺省值压缩(V 8GA)：对变长列中的零长度空数据和系统缺省值进行压缩。
In lines 22 through 34 you select an operating system that is not NULL from the list obtained in previous step.
从第22行到第34行从上一步中获得的数组中选择一个不为空的操作系统。
You can also use the system catalog views to retrieve information about NOT NULL, unique, primary key, foreign key, and table check constraints. For example.
也可以使用系统编目视图来检索关于NOT NULL、惟一、主键、外键和表检查约束的信息。
In the context of the NorthWind Customer Manager; when a Customer ID that does not exist in the system is used to load a Customer detail, then a Null instance should be returned.
在Northwind客户管理的上下文中，当使用系统中不存在的客户ID加载客户细节时，应该返回一个空实例。
The information about occurrences of NULL values is stored in the NUMNULLS column of the system catalog view SYSCAT.COLUMNS.
关于null值出现次数的信息存储在系统编目视图syscat .COLUMNS中的NUMNULLS列中。
The system level error includes syntactical error, null pointer exception, web service timeout, database connection timeout, and so on.
系统级错误包括语法错误、空指针异常、web服务超时、数据库连接超时等。
This provides the flexibility in type system design to map null objects to their corresponding XML types.
这就为类型系统设计提供了将空(null)对象映射为其对应的xml类型的灵活性。
The first parameter to session.getDatabase is the name of a server where null means the local system.
getDatabase 的第一个参数是服务器名称，其中null意味着是本地系统。
It turns out that the Root 1 file system isn't even formatted; it's just 256 MB of null bytes. But the Root 2 file system is golden.
这显示Root1文件系统尚未格式化；它只是256MB的空字节。
When a password system was installed, Stallman broke it down, resetting passwords to null strings, then sent users messages informing them of the removal of the password system.
一旦有密码系统安装，斯托曼就将它破解，然后设为空密码并发邮件告诉同事们。
Finally, we consider the exact null controllability of the system.
第三部分考虑了系统的精确零能控性。
The system was converted to the block controllable form consisting of two parts, one was the range space subsystem and the other was the stable null space subsystem.
通过状态变换和去耦合处理将系统转换为块能控标准型，它由值域空间子系统和稳定的零空间子系统组成。
Based on this new method, a selective algorithm is introduced for the purpose of reducing the number of controlled elements for null steering, and increasing the robust of the system.
为了减少每次需要控制的阵元数，提高系统鲁棒性，在此基础上进一步提出了利用天线选择性幅值扰动形成零陷的方法。
Enabling value compression allows for no disk storage to be consumed by NULL values, zero length data in variable length columns and system default values.
数值压缩不为空值、可变长度列中的零长度数据和系统默认值提供磁盘空间。
Aiming at incomplete information of indicator system, this paper sets up null value dealing model of indicator system based on rough set.
针对指标体系信息不完备的特定问题，建立了基于粗糙集的指标体系空值处理模型。
Another special modification that Moog routinely performs is customized spool null cutting to solve specific system or machine problems.
另一个特别的修改，是执行例行的穆格阀芯空切割定制解决特定的系统或机器的问题。
And the princer system can suit workpiece with different thickness and there is benchmark null position stop. The workpiece is supported by ball operation board.
夹钳系统能适合不同的厚度的工作，设有基准零位挡块，工件由滚球工作台支撑。
Automatic null-tracking technique overcomes slow system drift.
用自动零跟踪技术克服系统的缓慢漂移。
The aberration characteristics of the optical system of a single conic reflector and a two-lens null corrector are discussed.
讨论了由单一二次反射镜和放在其后的两透镜无光焦度校正板组成的光学系统的像差特性。
After that we research on smart antenna null question and advance the antilogy of angle extend based on phase interference arithmetic, it extend system null and ameliorate system capability.
随后又对智能天线的零陷问题进行了相应的研究，并在相位扰动形成零陷的基础上引入了干扰角度扩展思想，使得系统零陷得以展宽，系统性能有了一定的改观。
A null-balance system is provided by balancing the magnetic forces by electrostatic forces.
零位平衡系统是靠静电力来平衡磁力而造成的。
Conclusion The activity of the histaminergic system decreased and the decrease might be one of the compensatory mechanisms for maintenance of the normal sleep in the null mice lacking DPR.
结论DPR基因敲除型小鼠脑中组胺能神经活性显著降低，这一变化可能是该种小鼠尚能维持正常睡眠的代偿机制之一。
Conclusion The activity of the histaminergic system decreased and the decrease might be one of the compensatory mechanisms for maintenance of the normal sleep in the null mice lacking DPR.
结论DPR基因敲除型小鼠脑中组胺能神经活性显著降低，这一变化可能是该种小鼠尚能维持正常睡眠的代偿机制之一。
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