null
美式发音: [nʌl] 英式发音:adj.没有价值的；无用的；【法】无法律效力的；【科技】没有
n.【数】数字零；【计】空位；空白符号；【电子】无信号
v.抵消；〈罕〉【法】宣布无效；〈罕〉彻底消灭
网络释义：列的空行数；空值排序；虚元
复数：nulls 过去式：nulled 现在分词：nulling 搭配同义词反义词Adj.+n.null string
adj.valid
adj.invalid,null and void,void,unacceptable,unsound
网络释义
adj.1.没有价值的;无用的2.【法】无法律效力的3.【科技】没有4.【数】相当于数字零的5.【逻,数】空集的6.无特点的1.没有价值的;无用的2.【法】无法律效力的3.【科技】没有4.【数】相当于数字零的5.【逻,数】空集的6.无特点的
n.1.【数】数字零2.【计】空位;空白符号3.【电子】无信号4.〈比喻〉空虚1.【数】数字零2.【计】空位;空白符号3.【电子】无信号4.〈比喻〉空虚
v.1.抵消2.【法】〈罕〉宣布无效3.〈罕〉彻底消灭
adj.1.with no value or effect2.[Law]of no legal or binding force3.[Sci-Tech]amounting to nothing4.[Mathematics]having or associated with the value zero5.[Logic,Mathematics]of a class or set: having no members6.lacking distinctive qualities, traits, or characteristics1.with no value or effect2.[Law]of no legal or binding force3.[Sci-Tech]amounting to nothing4.[Mathematics]having or associated with the value zero5.[Logic,Mathematics]of a class or set: having no members6.lacking distinctive qualities, traits, or characteristics
n.1.[Mathematics]a zero2.[Computer]a character which produces no effect or action but is used to fill up a space or to separate pieces of information3.[Electronics]a condition of no signal4.<figurative>a state of emptiness, featurelessnes1.[Mathematics]a zero2.[Computer]a character which produces no effect or action but is used to fill up a space or to separate pieces of information3.[Electronics]a condition of no signal4.<figurative>a state of emptiness, featurelessnes
v.1.to cancel out or remove (a force, effect, signal, etc)2.[Law]<rare>to annul or cancel3.<rare>to destroy or efface completely
1.空 ... NDV NUM_DISTINCT 列的不重复值数 NULLS NUM_NULLS 列的空行数 LO LOW_VALUE 列的最小 …
3.空值排序[转]Oracle SQL 空值排序(Nulls)及Order by 数字 发表时间：2012-12-4 9:52:58 77site链接交易平台 77site站长资讯网 登录 注 …
4.虚元干扰频率分析法" 加入虚元(nulls)：虚元不代表字母、是像空格一样不具任何意义的字母或符号。收信者知道要略去虚元。2. 明 …
5.调整零点适应性地调整波束的方向來追踪每一个用户， 同时也调整零点(Nulls)的方向來对准干扰源 同时也调整零点(N ll )的方向來对准干 …
造句带翻译释义:,没有价值的,无用的,无法律效力的,没有,数字零,空位,空白符号,无信号,抵消,〈罕〉宣布无效,〈罕〉彻底消灭,列的空行数,空值排序,虚元1.Char and binary columns that do not allow nulls are always padded to the length of the column.始终将不允许为空的char和binary列填充到列长。
2.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Nullsuppression替换。
3.Note that this setting is independent of the nulls setting in the columns contained in the foreign key.注意该设置与外键中所包含列的nulls设置无关。
4.Add table columns , and specify the column name and data type of the new column, as well as whether the column allows nulls .添加表列，指定列名和新列的数据类型以及该列是否允许空值。
5.Define a primary key to enforce uniqueness for values entered in specified columns that do not allow nulls .定义主键可以对在不允许空值的指定列中输入的值强制唯一性。
6.The ANSI_NULLS option must have been set to ON for the execution of all CREATE TABLE statements that create tables referenced by the view.要执行所有CREATETABLE语句以创建视图引用的表，ANSI_NULLS选项必须设置为ON。
7.Analysis Services ignores nulls when calculating the maximum value in a set of numbers.计算一组数值的最大值时，AnalysisServices将忽略空值。
8.The bcp command and BULK INSERT statement both allow you to specify that nulls values be retained.bcp命令和BULKINSERT语句都允许指定保留空值。
9.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。
10.The aggregate uses custom serialization, has a maximum size of 8000 bytes when serialized, and is invariant to nulls, duplicates, and order.该聚合使用自定义序列化，在进行序列化时具有8000字节的最大大小，且与空值、重复值和顺序无关。