foreign key
A composite key.
When a record is identified by a combination of two fields, it is called a composite key. This means that the combination of both fields must be unique in the database to identify a specific record.
secondary key
Fields.
In a database, a record is a complete set of fields that represents one entity in a table. It typically contains different pieces of information related to that entity, organized in a structured format such as rows and columns. Each record is a unique entry in the database and can be identified by a primary key.
A category of data in databases is called a field. It represents a specific piece of information within a database record, such as a name or an address. Multiple fields are combined to form a database record, which is then organized in a table.
When a record is identified by a combination of two fields, it is called a composite key. This means that the combination of both fields must be unique in the database to identify a specific record.
A record in the database is known as a tuple. A record that is identified by a combination of two fields has a composite key.
secondary key
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Record