Which keyword stipulates that a column must refer to values in a different table and column?
Question
Which keyword stipulates that a column must refer to values in a different table and column?
Solution
The keyword that stipulates a column must refer to values in a different table and column is FOREIGN KEY.
In relational database management systems, a foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table. This is a way to enforce referential integrity within your database. The foreign key is a crucial concept used to establish and enforce a link between the data in the two tables, allowing for a relational structure to maintain the relationship between them.
By using foreign keys, databases ensure that the referencing data remains consistent, and it helps prevent orphaned records, where a record in one table would not have a corresponding record in the referenced table.
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