A key is a single or combination of multiple fields in a table. It is used to fetch or retrieve records/data rows from the data table according to the condition/requirement. Keys are also used to create a relationship among different database tables or views.
types of keys : SQL provides different types of keys such as super key, candidate key, primary key, foreign key, alternate key, compound key, composite key, and so on.
types of keys : SQL provides different types of keys such as super key, candidate key, primary key, foreign key, alternate key, compound key, composite key, and so on.
Different Types of SQL Keys
A key is a single or combination of multiple fields in a table. It is used to fetch or retrieve records/data rows from the data table according to the condition/requirement. Keys are also used to create a relationship among different database tables or views. types of keys : SQL provides different types of keys such as super key, candidate key, primary key, foreign key, alternate key, compound key, composite key, and so on.
