Define team: super key, unique key, primary key, foreign key and composite key
Answers
Answered by
2
Answer:
Super key-A super key is a group of single or multiple keys which identifies rows in a table.
Unique key-A unique key is a set of one or more than one fields/columns of a table that uniquely identify a record in a database table.
Primary key-A primary key is either an existing table column or a column that is specifically generated by the database according to a defined sequence.
Foriegn key-A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table.
Composite key-A primary key having two or more attributes is called composite key.
Similar questions