The number of NULLs in the column.
列中null值的个数。
The CWF fields must be padded with SPACES (not NULLS).
CWF字段必须带空格(而不是NULL)。
The value for the first key is 4 bytes long and it is entirely NULLs.
第一个键的值为4字节且其完全为 NULL。
Nulls are not matched to any value, including other instances of null.
空值不与任何值匹配，包括其他实例的空值。
Likewise, if the NULLS last option is used, the last partition must end with MAXVALUE.
同样，如果使用NULLS LAST选项，最后一个分区必须结束于MAXVALUE。
RPG uses a 1 character field (like an indicator) to determine if a column contains nulls.
RPG使用一个1字符字段（比如一个指示符）来确定列是否包含空值。
That code would have created a new trail with a Trail object with nulls for all attributes.
这个代码应当创建一条新路线，该路线有一个所有属性都为null 的Trail对象。
The general requirement for these algorithms is that the container does not contain any nulls.
这些算法的通用要求是，容器不能包含任意空值。
For this report run only nulls are being suppressed on both the row and column edge of the crosstab.
对于该报表运行，仅在交叉表的行和列边缘上抑制了nulls。
SQL/XML is good if you want results returned as sets and missing XML elements represented with nulls.
如果您希望将结果作为集合返回，且将丢失的XML元素表示为空，那么SQL/XML有优势。
For each of the columns, be sure to select the right data type and to uncheck the Allow Nulls options.
对每个列，要确保选择了正确的数据类型，并取消“允许为空”复选框。
The two nulls indicate that we do not want to change the last access time or creation time for this file.
这两个null指出，我们不想改变这一文件的最后访问时间或者创建时间。
It's the situation where, for instance, someone passes a null value to a method not coded to handle nulls.
比方说，把null值传入一个并未编写如何处理null值的方法中，这就是一种边界情况。
Define a primary key to enforce uniqueness for values entered in specified columns that do not allow nulls.
定义主键以对不允许空值的指定列中输入的值强制唯一性。
SQL USES a small integer which contains a zero if the column is not null or -1 if the column contains nulls.
如果列不包含空值，则SQL使用一个包含一个0的小整数；反之则包含- 1。
While a normal index can be used, it wastes a lot of space for nulls you are probably not going to query against.
如果使用普通索引的话，即使你并不打算对它进行查询，它也会因为null值浪费大量的空间。
It is important to note that when the NULLS first option is specified, the first partition must start at MINVALUE.
一定要注意，当指定NULLS FIRST选项时，第一个分区必须从MINVALUE开始。
In the bulk copy, all you need to do is select only those rows that have no nulls in the latitude and longitude columns.
在批量复制中，只选择在latitude和longitude列中没有null值的那些行。
Finally, if you lack email addresses for some Gold customers, you may want to write a query to exclude nulls from the result set.
最后，如果有些Gold客户没有email地址，那么可能要编写一个查询从结果集中排除null值。
An easy way to do this is to enable the REL function after zero check is disabled, which nulls out the charge reading caused by the hop.
为做到这一点，简单的做法是，在零点检查关闭之后打开REL功能，这样就能把零跳的读数消除掉。
Since the requirement is to only suppress nulls, the visual null suppression can be replaced by the null suppression on the actual query.
因为需求是仅抑制nulls，可视的nullsuppression可由实际查询上的null suppression替换。
If one record set has more rows than the other, data in that column will continue while nulls will be displayed for the other as seen below.
如果一个记录集比另一个多，此列中的数据将会继续增加，而另一个显示null，如下所示。
The additional column can have a (false) default value that is modified only when the partner column has a value, avoiding the need for nulls.
这个额外的列可以拥有一个(假)默认值，这个值仅在partner列有值时才被修改，从而避免使用null值。
In particular, the final example of translating new line characters to nulls would not work if some file names already contained new line characters.
尤其是在最后一个例子中，如果一些文件名已经包含新行字符串，那么将新行字符串转换成null字符串将导致错误。
Numerical results show the effectiveness of the proposed technique, the null depth levels obtained are lower than those reported in the literatures. Nulls are imposed both...
计算实例说明提出的算法十分有效，获得了比已有文献更低的零深，并且可以在主瓣附近或旁瓣区生成零点，也可以在对称主瓣两侧方向生成零点。
This paper deals with the semantics of null values in functional dependencies in database theory, and presents three different definitions of FDs in a single relation with marked nulls.
本文研究关系数据库理论中空值在函数依赖中的语义问题，提出了带标志空值的关系中函数依赖的三种定义。
The default model binder also cannot assign a null value to a property that does not accept nulls. In particular, the model binder cannot assign a null value to the UnitsInStock property.
默认的模型绑定器同样不能指定一个null值到一个不允许为null的属性中，这里的情况是模型绑定其不能指定一个null值到UnitsInStock属性中。
To work around this problem, select the following columns of the selected table when you add a data form by using the Data Form Wizard: the primary column and a column that does not permit NULLs.
若要解决此问题，请在添加数据窗体时通过使用“数据窗体向导”选择所选表中的以下列：主列和不允许 NULL 的列。
To work around this problem, select the following columns of the selected table when you add a data form by using the Data Form Wizard: the primary column and a column that does not permit NULLs.
若要解决此问题，请在添加数据窗体时通过使用“数据窗体向导”选择所选表中的以下列：主列和不允许 NULL 的列。
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