A sesandary key is a field in one table whose values are required to match the primary key of another table.

Name: A sesandary key is a field in one table whose values are required to match the primary key of another table.
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A secondary key is not required to match the primary key of another table; it is used for indexing and improving query performance within the same table. The term you're describing is a "foreign key."

A Sesandary Key Is a Field in One Table Whose