Data-Management-Foundations Exam Dumps - WGU Data Management – Foundations Exam

In MySQL, theBIGINTdata type is a64-bit integerthat requires8 bytes (64 bits) of storage. It is used to store large numerical values beyond the range of INT (4 bytes).

Option A (Incorrect):1 byte corresponds toTINYINT, which can store values from -128 to 127.

Option B (Incorrect):3 bytes is not a standard integer storage size in MySQL.

Option C (Incorrect):4 bytes corresponds toINT, which has a range of -2,147,483,648 to 2,147,483,647.

Option D (Correct):BIGINT takes8 bytesand supports a massive range of numbers from -2^63 to 2^63 -1.

When a VIEW is created in SQL, users mayinsert or updatedata through that view. However, if a row is inserted or updated in such a way that itviolates the conditionof the VIEW’s WHERE clause, it can lead to inconsistencies.

Topreventsuch unwanted modifications,SQL provides the WITH CHECK OPTION clause.

How WITH CHECK OPTION Works:

Ensures thatany new data (INSERT/UPDATE) still fits within the defined constraints of the VIEW.

If a user tries to insert or update a row that would not appear in the VIEW,the operation isrejected.

Example:

sql

CREATE VIEW HighSalaryEmployees AS

SELECT * FROM Employees WHERE Salary > 50000

WITH CHECK OPTION;

Now, if someone attempts:

sql

INSERT INTO HighSalaryEmployees (ID, Name, Salary)

VALUES (101, 'Alice', 30000);

Thisfailsbecause 30000 does not satisfy Salary > 50000.

Why Other Options Are Incorrect:

Option B (Incorrect):JOIN VIEWS isnot a valid SQL clause.

Option C (Incorrect):MATERIALIZED VIEW refers tostored viewsin some databases, but it doesnotreject incorrect inserts/updates.

Option D (Incorrect):BASE TABLE refers to theoriginal table from which a VIEW is created.

Thus, the correct answer is WITH CHECK OPTION, whichensures that only valid data modifications occur.