nullability
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英
例句
Part of the row, known as the null bitmap, may be reserved to manage column nullability.
可以保留行的一部分（称为“空位图”），以管理列的为空性。
The nullability property of arithmetic operators over floating point data type is always nullable.
对浮点数据类型执行运算的算术运算符的为空性属性始终可为空。
Part of the row, known as the null bitmap, is reserved to manage column nullability.
保留行中称为空位图的部分以管理列的为空性。
New columns defined without explicit nullability do not allow nulls.
未显式定义为空性的新列不允许使用空值。
The nullability characteristics of each column must be the same.
每列的为空性（nullability）特征必须相同。
Cannot change the base type, length, precision, scale, nullability, or collation of an existing User-defined datatype.
无法更改用户定义的现有数据类型的基本类型、长度、精度、小数位数、为空性或整理规则。
Design attribute domain integrity. Considerations include CHECK constraints, data types, and nullability.
设计域完整性属性。考虑CHECK约束，数据类型和是否非空。
In addition to specifying the attributes for your assemblies correctly, your class must also support nullability.
除了正确地指定程序集的属性之外，类还必须支持可空性。
DrySQL endeavors to exactly mirror the behavior of database constraints, and introduces validates_nullability_of as an example of this.
DrySQL致力于准确的模仿数据库约束的某些行为，validates_nullabillity_of就是一个很好的例子。
Modifies the behavior of the session to override default nullability of new columns when the ANSI null default.
时，修改会话的行为以覆盖新列的默认为空性。
Use the GETANSINULL system function to determine the current default nullability.
使用GETANSINULL系统函数可确定当前默认的为空性。
When nullability is not explicitly defined, it will be assigned based on the ANSI null default setting for the database or connection.
如果未明确定义为空性，系统将基于数据库或连接的ANSINULL默认设置进行指定。
New columns defined without explicit nullability are defined to allow nulls.
未显式定义为空性的新列允许使用空值。
Each column in a table has a set of properties, such as name, data type, nullability, and data length.
表中每一列都有一组属性，例如名称、数据类型、为空性和数据长度。
Specifies the nullability property of the column based on the column in the underlying table, value or named query.
基于基础表、值或命名查询中的列指定列的为空性属性。
Therefore, it is very important for the remote table definition to include column nullability.
因此，远程表的定义允许列可以为空这一点非常重要。
Nullability (whether the data type allows null values)
为空性（数据类型是否允许空值）
