Question

what is foreign key? Is it similar to primary key? If not why? Answer in around 50-60 words​

Answer 1

Answer:

No foreign key is not similar to primary key

Explanation:

because a foreign key is a column or set of colomn in one table that references the primary Key column in another table

The primary key is defined as colomn where each value is unique and identifies a single row of the 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...... foreign key can accept multiple null value. By default primary key clustered inbox and data in the database in physically organized in the sequence in the clustered inbox folder