Foreign keys are the columns of a table that points to the primary key of another table. They act as a cross-reference between tables.
In detail : 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. In simpler words, the foreign key is defined in a second table, but it refers to the primary key or a unique key in the first table.
Vermin are pests or nuisance animals that spread diseases or destroy crops or livestock. Himachal Pradesh state govt recently declared Monkeys as vermin.
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