How do foreign keys relate to candidate keys

Surrogate Key — An artificial key which aims to uniquely identify each record is called a surrogate key. What is a Primary Key? What is the Alternate key? What is a Candidate Key? What is the Foreign key? What is the Compound key? What is the Composite key? What is a Surrogate key? It is a field in the table that is the primary key of another table.

Primary Key never accept null values. A foreign key may accept multiple null values. Primary key is a clustered index and data in the DBMS table are physically organized in the sequence of the clustered index. A foreign key cannot automatically create an index, clustered or non-clustered. However, you can manually create an index on the foreign key.

You can have the single Primary key in a table. You can have multiple foreign keys in a table. Report a Bug. Previous Prev. Next Continue. Home Testing Expand child menu Expand.

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A company sells health products at a number of shops throughout the country. Support for inclusion dependency constraints is a good thing. The syntax is "bad" because it calls the constraint a foreign key when it isn't. Wouldn't all operations on an inclusion constraint have to be well-defined? Erwin Smout Erwin Smout Milan Adhikari Milan Adhikari 91 1 1 silver badge 4 4 bronze badges. Amandeep Amandeep 21 5 5 bronze badges.

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