MCQ King
SQLite – Handling NULL Values
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1. What does NULL represent in SQLite?
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2. In SQLite, how are NULL values treated in comparisons and expressions?
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3. What is the purpose of the IS NULL operator in SQLite?
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4. In SQLite, how can you check if a column contains NULL values in a SELECT statement?
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5. What is the result of a mathematical operation involving a NULL value in SQLite?
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6. In SQLite, how can you handle NULL values in expressions using the COALESCE function?
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7. What does the IFNULL function in SQLite do?
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8. In SQLite, how can you replace NULL values with a default value in a SELECT statement?
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9. What is the purpose of the NULLIF function in SQLite?
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10. In SQLite, which SQL statement is used to insert NULL values into a table column?
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11. What happens when you insert a NULL value into a NOT NULL column in SQLite?
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12. In SQLite, how can you update an existing value in a column to NULL?
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13. What is the purpose of the IS NOT NULL operator in SQLite?
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14. In SQLite, what is the result of a mathematical operation involving a NULL value when one operand is not NULL?
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15. How can you handle NULL values in expressions using the COALESCE function in SQLite?
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