11.
Which SQL keyword is used to retrieve only unique values?

12.
Which SQL keyword is used to retrieve a maximum value?

13.
What is a view?

14.
Which of the following SQL commands is used to retrieve data?

15.
Which of the following is a SQL aggregate function?

16.
Which SQL statement is used to update data in a database?

17.
Which SQL statement is used to delete data FROM a database?

18.
Which SQL keyword is used to sort the result-set?

19.
The SQL statement
SELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

20.
Which of the following group functions ignore NULL values?