Question: i need answer please Data abstraction - External, Conceptual, Internal The Schema Big Data NO SQL rows (tuples) and columns (attributes) Primary and Foreign Keys

i need answer please

Data abstraction - External, Conceptual, Internal The Schema Big Data NO SQL rows (tuples) and columns (attributes) Primary and Foreign Keys Composite key -Composed of more than one attribute Key attribute -Any attribute that is part of a key Avoiding Many to Many (M:N) relationships. Referential integrity - FK contains a value that refers to an existing valid tuple (row) in another relation Data dictionary -a reference repository containing metadata. Data abstraction - External, Conceptual, Internal The Schema Big Data NO SQL rows (tuples) and columns (attributes) Primary and Foreign Keys Composite key -Composed of more than one attribute Key attribute -Any attribute that is part of a key Avoiding Many to Many (M:N) relationships. Referential integrity - FK contains a value that refers to an existing valid tuple (row) in another relation Data dictionary -a reference repository containing metadata

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