nullability

美 　英

• 網(wǎng)絡(luò)為空性；空值；空屬性

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（稱為“空位圖”），以管理列的為空性。

The nullability property of arithmetic operators over floating point data type is always nullable.

對(duì)浮點(diǎn)數(shù)據(jù)類型執(zhí)行運(yùn)算的算術(shù)運(yùn)算符的為空性屬性始終可為空。

Part of the row, known as the null bitmap, is reserved to manage column nullability.

保留行中稱為空位圖的部分以管理列的為空性。

New columns defined without explicit nullability do not allow nulls.

未顯式定義為空性的新列不允許使用空值。

The nullability characteristics of each column must be the same.

每列的為空性（nullability）特征必須相同。

Cannot change the base type, length, precision, scale, nullability, or collation of an existing User-defined datatype.

無(wú)法更改用戶定義的現(xiàn)有數(shù)據(jù)類型的基本類型、長(zhǎng)度、精度、小數(shù)位數(shù)、為空性或整理規(guī)則。

Design attribute domain integrity. Considerations include CHECK constraints, data types, and nullability.

設(shè)計(jì)域完整性屬性。考慮CHECK約束，數(shù)據(jù)類型和是否非空。

In addition to specifying the attributes for your assemblies correctly, your class must also support nullability.

除了正確地指定程序集的屬性之外，類還必須支持可空性。

DrySQL endeavors to exactly mirror the behavior of database constraints, and introduces validates_nullability_of as an example of this.

DrySQL致力于準(zhǔn)確的模仿數(shù)據(jù)庫(kù)約束的某些行為，validates_nullabillity_of就是一個(gè)很好的例子。

Modifies the behavior of the session to override default nullability of new columns when the ANSI null default.

時(shí)，修改會(huì)話的行為以覆蓋新列的默認(rèn)為空性。

Use the GETANSINULL system function to determine the current default nullability.

使用GETANSINULL系統(tǒng)函數(shù)可確定當(dāng)前默認(rèn)的為空性。

When nullability is not explicitly defined, it will be assigned based on the ANSI null default setting for the database or connection.

如果未明確定義為空性，系統(tǒng)將基于數(shù)據(jù)庫(kù)或連接的ANSINULL默認(rèn)設(shè)置進(jìn)行指定。

New columns defined without explicit nullability are defined to allow nulls.

未顯式定義為空性的新列允許使用空值。

Each column in a table has a set of properties, such as name, data type, nullability, and data length.

表中每一列都有一組屬性，例如名稱、數(shù)據(jù)類型、為空性和數(shù)據(jù)長(zhǎng)度。

Specifies the nullability property of the column based on the column in the underlying table, value or named query.

基于基礎(chǔ)表、值或命名查詢中的列指定列的為空性屬性。

Therefore, it is very important for the remote table definition to include column nullability.

因此，遠(yuǎn)程表的定義允許列可以為空這一點(diǎn)非常重要。

Nullability (whether the data type allows null values)

為空性（數(shù)據(jù)類型是否允許空值）