为空性 meaning in English
nullability
Examples
- Change the nullability of the column from not null to null
将列的为空性从not null改为null 。 - 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。 - 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。 - Determines the default value , null or not null , of a column ,
确定在create table或alter table语句中未显式定义为空性的 - You can also set default members for individual roles in custom rules for dimension security
别名类型可以指定特定的数据类型、长度和为空性。