Question

Define the following
1)Tuple
2)Foreign key​

Answer 1

1.a data structure consisting of multiple parts.

2.In the context of relational databases, a foreign key is a field 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.

Answer 2

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