candidate superkeys
候选超键
composite superkeys
复合超键
primary superkeys
主超键
identifying superkeys
识别超键
defining superkeys
定义超键
valid superkeys
有效超键
minimal superkeys
最小超键
unique superkeys
唯一超键
several superkeys
几个超键
two superkeys
两个超键
the database administrator generated several superkeys for the new table.
数据库管理员为新表生成了几个超键。
a superkey can contain redundant attributes that are not necessary for unique identification.
超键可以包含对于唯一标识不必要的冗余属性。
we need to identify the minimal superkey, which is the candidate key.
我们需要识别最小超键，即候选键。
the superkey consisting of all columns guarantees uniqueness.
包含所有列的超键保证唯一性。
each superkey must include the primary key as a subset.
每个超键必须将主键作为子集。
the system automatically validates superkeys for uniqueness constraints.
系统自动验证超键的唯一性约束。
superkeys are essential for maintaining data integrity in relational databases.
超键对于维护关系数据库的数据完整性至关重要。
the analyst examined all possible superkeys in the normalization process.
分析师在规范化过程中检查了所有可能的超键。
removing unnecessary attributes from a superkey produces a candidate key.
从超键中删除不必要的属性会产生候选键。
the foreign key references a superkey in the parent table.
外键引用父表中的超键。
understanding superkeys is fundamental to database design theory.
理解超键是数据库设计理论的基础。
the relation has three distinct superkeys that satisfy the uniqueness requirement.
该关系有三个满足唯一性要求的不同超键。
candidate superkeys
候选超键
composite superkeys
复合超键
primary superkeys
主超键
identifying superkeys
识别超键
defining superkeys
定义超键
valid superkeys
有效超键
minimal superkeys
最小超键
unique superkeys
唯一超键
several superkeys
几个超键
two superkeys
两个超键
the database administrator generated several superkeys for the new table.
数据库管理员为新表生成了几个超键。
a superkey can contain redundant attributes that are not necessary for unique identification.
超键可以包含对于唯一标识不必要的冗余属性。
we need to identify the minimal superkey, which is the candidate key.
我们需要识别最小超键，即候选键。
the superkey consisting of all columns guarantees uniqueness.
包含所有列的超键保证唯一性。
each superkey must include the primary key as a subset.
每个超键必须将主键作为子集。
the system automatically validates superkeys for uniqueness constraints.
系统自动验证超键的唯一性约束。
superkeys are essential for maintaining data integrity in relational databases.
超键对于维护关系数据库的数据完整性至关重要。
the analyst examined all possible superkeys in the normalization process.
分析师在规范化过程中检查了所有可能的超键。
removing unnecessary attributes from a superkey produces a candidate key.
从超键中删除不必要的属性会产生候选键。
the foreign key references a superkey in the parent table.
外键引用父表中的超键。
understanding superkeys is fundamental to database design theory.
理解超键是数据库设计理论的基础。
the relation has three distinct superkeys that satisfy the uniqueness requirement.
该关系有三个满足唯一性要求的不同超键。
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