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6. The statement in SQL which allows to change the definition of a table is
Alter
Update
Create
Select
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7. Which of the following is correct:
a SQL query automatically eliminates duplicates.
SQL permits attribute names to be repeated in the same relation.
a SQL query will not work if there are no indexes on the relations
None of these
8. Which of the following is a valid SQL type?
CHARACTER
NUMERIC
FLOAT
All of the above
9. Which of the following operations need the participating relations to be union compatible?
UNION
INTERSECTION
DIFFERENCE
All of these
10. The full form of DDL is
Dynamic Data Language
Detailed Data Language
Data Definition Language
Data Derivation Language
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