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Primary and foreign keys
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Primary and foreign keys
Foreign key
- A field in one table that uniquely identifies a row of another table or the same table. It is defined in a second table, but it refers to the primary key
Primary key
- a column or a row of columns that uniquely identifies a row in a table
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- Year 10 Computing Mind Map on Primary and foreign keys, created by Leo Bideleux on 11/05/2018.
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- Leo Bideleux
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