If the key is part of a linking table it can be.
Yes, a primary key can also be a foreign key. This is known as a composite key, where one or more columns in a table are both primary keys for that table and also act as foreign keys linking to another table.
A foreign key is a field in a database table that is used to establish a relationship with another table. It ensures referential integrity by enforcing a link between two tables based on a matching key. This key is typically a primary key in the referenced table.
A key is considered a foreign key if it references the primary key of another table to establish a relationship between the two tables. It enforces referential integrity, ensuring that data in the foreign key column corresponds to data in the primary key column.
A foreign key in a table references the primary key in another table, creating a relationship between the two tables. This ensures referential integrity, meaning that values in the foreign key column must exist in the primary key column. This relationship allows data to be linked and maintained consistently between the tables.
A Foreign Key in SQL is used to establish a relationship between two tables. It ensures referential integrity by enforcing that values in a column (or columns) in one table must match the values in a primary key in another table. This helps maintain consistency and data integrity across linked tables.
The Foreign Key Constraint property creates a relationship between two tables in the database. It enforces referential integrity, ensuring that a foreign key column in one table must have a corresponding primary key value in another table. This helps maintain data consistency and avoid orphaned records.
A foreign key is a field in a database table that is used to establish a relationship with another table. It ensures referential integrity by enforcing a link between two tables based on a matching key. This key is typically a primary key in the referenced table.
Because the foreign key is copied from the primary key of the parent table
Foreign keys are used to link one database with another. A primary key is an attribute of a record that allows users to identify information.
A primary key is one that uniquely identifies a record . Also there are cases when primary key of one file appears in another file. In that case the key is called Foreign key.
In sql you use primary key more than one column in a table
It is not mandatory that is must be a primary key but it must be a unique key in the other table.
We designate one of the candidate key of a relation to be a primary key because that primary key is use for any foreign key references.
A primary key is a unique identifier for a record in a table and ensures each record is uniquely identified. A foreign key establishes a relationship between two tables by referencing the primary key in another table. It enforces referential integrity by ensuring that the values in the foreign key column correspond to values in the primary key column of another table.
A primary key uniquely identifies each record in a table and ensures data integrity. A foreign key establishes a relationship between two tables, referencing the primary key of another table to enforce referential integrity.
It is the DBMS that ensures the value of the foreign key matches another table's primary key when referential integrity constraints are enabled within the DBMS
foreign key constraint defines a column or combinations of columns whose values match the primary key of another table.
False. A foreign key is a primary of one table that is in another table. A foreign key can be repeated, so it does not uniquely identify records in the table where it is a foreign key.