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Primary Key vs Foreign Key Explained Simply | QuantumNique Solutions Private Limited

Primary Key vs Foreign Key Explained Simply | QuantumNique Solutions Private Limited

A simple way to explain the difference between Primary Key and Foreign Key in interviews: Think of a passport system. A passport number uniquely identifies a person — that is a Primary Key. When you apply for a visa, the visa system stores your passport number again to link the visa application to your passport details. In that table, the ...

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