Unique constraints are also called keys.
唯一约束也称为键。
You can also drop primary keys, indexes, and unique constraints from the update script.
您也可以从更新指令码置放主索引键、索引和唯一的条件约束。
If you are generating data for columns that have unique constraints, it will likely fail.
如果要为具有唯一约束的列生成数据，则很可能会失败。
A one-to-one relationship is created if both of the related columns are primary keys or have unique constraints.
当两个相关列都是主键或都具有唯一约束时，将创建一对一关系。
Businesses need to impose unique constraints on this information even when they use vertical industry standards for exchange.
即使在交换中使用纵向行业标准，企业仍然需要对这些信息应用唯一的约束。
You can attach multiple unique constraints to a table, whereas you can attach only one primary key constraint to a table.
可将多个唯一约束附加到表，但是只能将一个主键约束附加到表。
This dialog box contains a set of properties for constraints (except unique constraints) attached to the tables in your database.
此对话框包含附加到数据库表的约束(唯一约束除外)的一组属性。
You can attach unique constraints to columns that allow null values, whereas you can attach primary key constraints only to columns that do not allow null values.
可将唯一约束附加到允许空值的列，但是只能将主键约束附加到不允许空值的列。
All DOC_IDs are unique to meet the foreign key constraints.
所有DOC_ID都是惟一的，以满足外键约束。
Design constraints indicate anything unique in a customer environment to which the portal will need to conform.
设计限制表示门户需要遵循的客户环境中的特殊要求。
Adding or dropping unique, distinct, or foreign key constraints.
添加或删除惟一、独特或外键约束。
You can also use the system catalog views to retrieve information about NOT NULL, unique, primary key, foreign key, and table check constraints. For example.
也可以使用系统编目视图来检索关于NOT NULL、惟一、主键、外键和表检查约束的信息。
These include the particle derivation and unique particle attribution constraints.
其中包括粒子派生(particlederivation)和惟一粒子属性(unique particle attribution)约束。
Part 6: Path-based integrity constraints: The goal of this part is to define features similar to WXS's xs: unique, xs: key, and xs: keyref.
第6部分：基于路径的完整性约束(Path - based integrity constraints)：该部分的目的是定义与WXS的xs：unique、xs：key和xs： keyref类似的特性。
Creating constraints on tables (for example, RI, informational, unique).
在表上创建约束(例如，RI、信息、惟一)。
Constraints Supports, primary, foreign, unique, not null constraint.
约束支持主键、外键、惟一和非空约束。
In summary, the migration process takes a unique procedure, depending on the requirements or constraints and the source type environment.
总之，根据需求、约束以及源环境的类型，迁移过程会采取特定的步骤。
A formal language for doing this also facilitates advertisement of such profiled constraints for services, while at the same time permitting a business to maintain a unique value proposition.
正式的语言可以加强对这种服务约束的宣传，同时又允许企业保留自己的利益主张。
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
未能启用约束。一行或多行中包含违反非空、唯一或外键约束的值。
Few constraints are imposed on the artist; and the more singular and unique the product of the artist 's exertions, the more highly it is valued.
艺术家创作时几乎没有约束或者限制，越非凡，并且越独特的作品，其价值也就越高。
This is because they are usually unique and complex, based on assumptions and constraints, with a range of stakeholders, and dependent on the performance of people.
原因是专案通常具独一性、复杂性、有其假设与限制，并牵涉许多不同程度的利益关系人，且专案成败取决于人员绩效。
This is because they are usually unique and complex, based on assumptions and constraints, with a range of stakeholders, and dependent on the performance of people.
原因是专案通常具独一性、复杂性、有其假设与限制，并牵涉许多不同程度的利益关系人，且专案成败取决于人员绩效。
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