True Or False

Question 11 :

Indexes can usually be created for both primary and secondary keys.


A). True
B). False
Answer : Option A

Question 12 :

Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.


A). True
B). False
Answer : Option A

Question 13 :

The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.


A). True
B). False
Answer : Option A

Question 14 :

SQL is a data sublanguage.


A). True
B). False
Answer : Option A

Question 15 :

The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.


A). True
B). False
Answer : Option A