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WGU Data Management – Foundations Exam Sample Questions (Q56-Q61):

NEW QUESTION # 56
Which SELECT statement uses valid syntax for SQL?

A. SELECT ALL column1, column2 FROM table_name;
B. SELECT "column name", "column name" FROM "table name" WHERE "column name"
C. SELECT column1, column2 WHERE condition FROM table_name;
D. SELECT column1, column2 FROM table_name;

Answer: D

Explanation:
Avalid SELECT statementin SQL follows this basic syntax:
sql
SELECT column1, column2
FROM table_name
WHERE condition;
The correct optionDfollows this syntaxcorrectly.
Why Other Options Are Incorrect:
* Option A (Incorrect):SQL does not usedouble quotes(") around column/table names unless explicitly required in some databases.
* Option B (Incorrect):The WHERE clausemust appear after the FROM clause.
* Option C (Incorrect):ALL isnota valid keyword in standard SQL queries.
Thus,Option Dfollows the correct SQL syntax.

NEW QUESTION # 57
Which keyword determines if a value is within a range of values?

A. IN
B. OR
C. BETWEEN
D. LIKE

Answer: C

Explanation:
TheBETWEENkeyword in SQL is used tofilter values within a specified range. It is particularly useful for numeric and date-based queries.
Syntax of BETWEEN:
sql
SELECT * FROM Employees WHERE Salary BETWEEN 50000 AND 100000;
* Retrievesall employees whose salary is between $50,000 and $100,000 (inclusive).
Why Other Options Are Incorrect:
* Option A (LIKE) (Incorrect):Used forpattern matchingwith wildcards (%, _). Example:
sql
SELECT * FROM Customers WHERE Name LIKE 'A%';
* Option B (IN) (Incorrect):Used tomatch a value in a specified set, butnot a range. Example:
sql
SELECT * FROM Employees WHERE Department IN ('HR', 'Finance', 'IT');
* Option C (OR) (Incorrect):Used forlogical conditions, but doesnot check a range. Example:
sql
SELECT * FROM Products WHERE Price < 10 OR Price > 50;
Thus, the correct choice is BETWEEN for filtering values within arange.

NEW QUESTION # 58
Which object relates an entity to itself in an entity-relationship model?

A. Reflexive relationship
B. Attribute
C. Relationship instance
D. Repository

Answer: A

Explanation:
Areflexive relationship(also called aunary relationship) occurs when anentity is related to itself.
Example Usage:
A screenshot of a computer AI-generated content may be incorrect.

CREATE TABLE Employees (
EmpID INT PRIMARY KEY,
Name VARCHAR(50),
ManagerID INT,
FOREIGN KEY (ManagerID) REFERENCES Employees(EmpID)
);
* ManagerIDrefers to another employeewithin the same table.
Why Other Options Are Incorrect:
* Option A (Repository) (Incorrect):A data storage structure, not a relationship type.
* Option B (Relationship instance) (Incorrect):Describesa specific connection between entities, not a reflexive relationship.
* Option D (Attribute) (Incorrect):Attributes storecharacteristics, butdo not define relationships.
Thus, the correct answer isReflexive relationship, as it relates an entity to itself.

NEW QUESTION # 59
Where does a primary key traditionally appear in a table?

A. In the last visible column
B. In the top row
C. In the table header
D. In the first column

Answer: D

Explanation:
Bydatabase design conventions, theprimary key is usually placed in the first columnof a table to make it easy to identify and reference.
Example Usage:
sql
CREATE TABLE Employees (
EmpID INT PRIMARY KEY, -- First column (convention)
Name VARCHAR(50),
Salary DECIMAL(10,2)
);
* EmpID is placed as the first columnfor clarity and quick access.
Why Other Options Are Incorrect:
* Option A (In the table header) (Incorrect):Table headers onlydisplay column names, they do not contain values.
* Option C (In the top row) (Incorrect):Thetop row contains data, not theprimary key definition.
* Option D (In the last visible column) (Incorrect):While technically possible,placing a primary key at the endisuncommonin database design.
Thus, the correct answer isIn the first column, as this is the standard convention in relational databases.

NEW QUESTION # 60
Which keyword or clause indicates the desired sequence when displaying a set of records returned from a SELECT statement?

A. DISTINCT
B. ORDER BY
C. LIKE
D. BETWEEN

Answer: B

Explanation:
TheORDER BYclause in SQL is used tosort query resultsinascending (ASC) or descending (DESC) order
.
Example Usage:
sql
SELECT Name, Salary FROM Employees ORDER BY Salary DESC;
* This retrieves all employees, sorted bysalary in descending order.
Why Other Options Are Incorrect:
* Option A (BETWEEN) (Incorrect):Used for filtering ranges butdoes not order results.
* Option B (DISTINCT) (Incorrect):Removes duplicate rows butdoes not control order.
* Option D (LIKE) (Incorrect):Used forpattern matching, not sorting.
Thus,ORDER BY is the correct choicefor defining the sequence of query results.

NEW QUESTION # 61
......

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