Select the correct constraint in SQL?

5. Select the correct constraint in SQL?

  1. NOT NULL
  2. CHECK
  3. DEFAULT
  4. All of the above

Answer: D) All of the above

Explanation:

The constraints available in SQL are:

  1. CHECK
  2. CREATE INDEX
  3. DEFAULT
  4. FOREIGN KEY
  5. NOT NULL
  6. PRIMARY KEY
  7. UNIQUE

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