Final answer:
A column with equivalent data in two or more tables is a Foreign Key. It matches another table's primary key column and is used to link the tables and maintain data integrity.
Step-by-step explanation:
The term that refers to a column with equivalent data that exists in two or more tables is known as a Foreign Key. A foreign key is a field in a relational table that matches the primary key column of another table. It creates a relationship between the two tables and is used to ensure the referential integrity of the data.
For example, consider two tables: Orders and Customers. The Customers table has a primary key called CustomerID, and the Orders table has a foreign key also called CustomerID. The CustomerID in the Orders table refers back to the CustomerID in the Customers table to indicate which customer made which order.
The correct answer is Foreign Key. A foreign key refers to a column with equivalent data that exists in two or more tables. It is used to establish a relationship between tables by linking the primary key of one table to the foreign key of another table. This ensures referential integrity and enables the retrieval of related data from multiple tables.