Is Unique key and Alternate Key same?

Question

Further, alternate key is unique all time in the table. Unlike the primary key, unique key is non-clustered index type as well as foreign key is to create a relationship with another table and it's used for data integrity. 13 дек. 2019 г.

Is unique key Alternate Key?

The remaining candidate keys are called unique keys because they can uniquely identify a record in a relation. Unique keys can consist of multiple columns. Unique keys are also called alternate keys. Unique keys are an alternative to the primary key of the relation.

What is key Alternate Key?

Alternate Key or Secondary Key is the key that has not been selected to be the primary key, but are candidate keys. However, it is considered a candidate key for the primary key.

Is Foreign Key and Alternate Key the same?

Alternate Key – is a column or group of columns in a table that uniquely identify every row in that table. Foreign Key – is a column that creates a relationship between two tables. The purpose of Foreign keys is to maintain data integrity and allow navigation between two different instances of an entity.

Is unique key and candidate key are same?

Unique: is a type of constraint not a key. Any column may be constrained to not allow duplicate values across the rows of the table. Candidate Keys are combinations of attributes that can be uniquely defined in a table/relation. There can be more than one candidate key possible.

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