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

In SQL,literalsrepresent explicit values such asnumbers, strings, or binary datadirectly written into queries. For example:

SELECT * FROM Employees WHERE Salary > 50000;

Here, 50000 is anumeric literal.

Option A (Correct):Literalsare explicit values used in SQL queries, such as 123, 'John Doe', and TRUE.

Option B (Incorrect):Commentsare non-executable text used for documentation within SQL code, typically denoted by -- or /* ... */.

Option C (Incorrect):Identifiersare names oftables, columns, or other database objects, such as EmployeeID.

Option D (Incorrect):Keywordsare reserved words in SQL (e.g., SELECT, FROM, WHERE) that define operations and syntax.

Arelationshipin an ER model defineshow two separate entities interact.

Example Usage:

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CREATE TABLE Customers (

CustomerID INT PRIMARY KEY,

Name VARCHAR(50)

);

CREATE TABLE Orders (

OrderID INT PRIMARY KEY,

CustomerID INT,

FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)

);

Customers and Orders are separate entities, related via CustomerID.

Why Other Options Are Incorrect:

Option A (Reflexive relationship) (Incorrect):Used forself-referencing entities, not two different entities.

Option B (Entity type) (Incorrect):Defines aclass of objects, but does not establish relationships.

Option D (Attribute) (Incorrect):Attributesdescribeentities but do not connect them.

Thus, the correct answer isRelationship, as it connectstwo separate entities.

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.