Question

What is FOREIGN KEY?

Answer 1

Answer:

A foreign key is a column is called foreign key.

Answer 2

Foreign key is a value in the database which value must match with the primary key value column of another table .

Explanation:

• The main objective of  FOREIGN Key is used to connecting the two tables and fetching the record by matching there value with the primary key value column of another table .

• We can used the FOREIGN KEY keyword for declaring any FOREIGN key value also there must be primary key value column is declared in other table

• For example

create table employ

(

   PRIMARY KEY (empid),

   FOREIGN KEY (stu_roll) REFERENCES student(stu_roll)

);

we used REFERENCES keyword for matching the value.

Learn more :

https://brainly.in/question/7796458