Question

Differentiate between field and a primary key​

Answer 1

Explanation:

A primary key is used to ensure data in the specific column is unique. A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. ... It refers to the field in a table which is the primary key of another table.

Answer 2

Answer:

Primary key uniquely identify a record in the table. Foreign key is a field in the table that is primary key in another table. ... By default, Primary key is clustered index and data in the database table is physically organized in the sequence of clustered index.

Note:

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