Jan 6, 2026 · An alternate key is any candidate key in a table that is not chosen as the primary key. In other words, all the keys that are not selected as the primary key are considered alternate keys.

Jun 28, 2024 · Eight types of key in DBMS are Super, Primary, Candidate, Alternate, Foreign, Compound, Composite, and Surrogate Key. A super key is a group of single or multiple keys which …

Feb 7, 2013 · In that case, the primary key of the table is not a super key of the domain. However, your primary key is not necessarily a candidate key - you can add redundant columns to your primary key.

Oct 25, 2024 · There can be multiple candidate keys in a table, but only one can be chosen as the primary key. Candidate keys also must meet the uniqueness and non-null requirements.

After Super Keys, we moved on to Candidate Keys which are the minimal and practical subsets of Super Keys. We also covered how to identify Candidate Keys, compared them with Super Keys, and saw …

May 2, 2025 · SQL supports various types of keys, including primary, foreign, unique, candidate, and composite keys. Each type of key has unique characteristics and functions, making it essential to …

Jan 5, 2020 · In this blog, we will learn about the various keys like the super key, candidate key, primary key, alternate key and foreign key. We will discuss how to identify and differentiate between them …

Summary: You will learn in this article, types of DBMS Keys such as Primary Key, Super Key, Candidate Key, Alternate Key, Foreign Key, Composite Key, Unique Key.

Jul 11, 2025 · Candidate keys play a main role in identifying the most important key known as the primary key. Super keys provide the foundation for selecting the candidate keys while candidate keys …

Mar 17, 2025 · Candidate keys, or minimal super keys, are identified using super keys. The characteristics or sets of characteristics that are utilized as primary keys in the table are known as …