How can you ensure data integrity in a relational database using SQL constraints?

  • Use CHECK constraints to validate data
  • Use FOREIGN KEY constraints to maintain referential integrity
  • Use PRIMARY KEY constraints to enforce uniqueness
  • Use UNIQUE constraints to enforce uniqueness
Data integrity in a relational database can be ensured using SQL constraints such as PRIMARY KEY (to enforce uniqueness), FOREIGN KEY (to maintain referential integrity), CHECK (to validate data), and UNIQUE (to enforce uniqueness).
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