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1. DML is provided for
A) Description of logical structure of database
B) Addition of new structure in the database system.
C) Manipulation & processing of database
D) Definition of physical structure of database system
2.'AS' clause is used in SQL for
A) Selection operation
B) Rename Operation
C) Join operation
D) Projection Operation
3. Count function in SQL returns the number of
A) values
B) distinct values
C) groups
D) columns
4. The statement in SQL which allows to change the definition of a table is
A) Alter
B) Update
C) Cteate
D) Select
5. Which of the following is correct.
A) A SQL query automatically eliminates duplicates
B) SQL permits attribute names to be repeated in the same relation
C) A SQL query will not work if there are no indexes on the relations
D) None of the above
6. Which of the following operation is used if we are interested in only certain columns of a table?
A) PROJECTION
B) SELECTION
C) UNION
D) JOIN
7. Which of the following is a legal expression in SQL?
A) SELECT NULL FROM EMPLOYEE;
B) SELECT NAME FROM EMPLOYEE;
C) SELECT NAME FROM EMPLOYEE WHERE SALARY=NULL;
D) None of the above
8. Which of the following is a valid SQL type?
A) CHARACTER
B) NUMERIC
C) FLOAT
D) All of the above
9. Which command is used to select distinct subject (SUB) from the table (BOOK)?
A) SELECT ALL FROM BOOK
B) SELECT DISTINCT SUB FROM BOOK
C) SELECT SUB FROM BOOK
D) All of the above
10. In SQL, which of the following is not a data definition language commands?
A) RENAME
B) REVOKE
C) GRANT
D) UPDATE
Answers:
1. DML is provided for
C) Manipulation & processing of database
2.'AS' clause is used in SQL for
B) Rename Operation
3. Count function in SQL returns the number of
A) values
4. The statement in SQL which allows to change the definition of a table is
A) Alter
5. Which of the following is correct.
D) None of the above
6. Which of the following operation is used if we are interested in only certain columns of a table?
A) PROJECTION
7. Which of the following is a legal expression in SQL?
B) SELECT NAME FROM EMPLOYEE;
8. Which of the following is a valid SQL type?
D) All of the above
9. Which command is used to select distinct subject (SUB) from the table (BOOK)?
B) SELECT DISTINCT SUB FROM BOOK
10. In SQL, which of the following is not a data definition language commands?
D) UPDATE
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