SQL for Database Construction - General Questions

1.

Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:

A.	GROUP BY.
B.	WHERE.
C.	ORDER BY.
D.	FROM

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

2.

What is an advantage of placing computations in SQL views?

A.	To save users from having to write an expression.
B.	To ensure that the results are consistent.
C.	To accomplish both of the above.
D.	None of the above is correct - computations cannot be placed in a view.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

3.

Which is NOT one of the most common types of SQL CHECK constraints?

A.	System date
B.	Range checks
C.	Lists of values
D.	Comparing one column value to another within the same table

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

4.

What SQL structure is used to limit column values of a table?

A.	The LIMIT constraint
B.	The CHECK constraint
C.	The VALUE constraint
D.	None of the above is correct.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5.

The SQL ALTER statement can be used to:

A.	change the table structure.
B.	change the table data.
C.	add rows to the table.
D.	delete rows from the table.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

6.

Which of the following is an SQL trigger supported by Oracle?

A.	BEFORE
B.	INSTEAD OF
C.	AFTER
D.	All of the above.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

7.

A reason for using an SQL view to hide columns is:

A.	to simplify a result only.
B.	to prevent the display of sensitive data only.
C.	to accomplish both of the above.
D.	None of the above are reasons for using an SQL view.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

8.

What is not an advantage of stored procedures?

A.	Greater security
B.	SQL can be optimized
C.	Code sharing
D.	Increased network traffic

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

1
2
3