WGU Data-Management-Foundations Dumps Questions Answers

In SQL, aprimary key is explicitly defined using the PRIMARY KEY keywordwhen creating a table.

Example Usage:

sql

CREATE TABLE Products (

ProductID INT PRIMARY KEY,

Name VARCHAR(100),

Price DECIMAL(10,2)

);

Here,PRIMARY KEY is the SQL keyword that designates ProductID as the primary key.

Why Other Options Are Incorrect:

Option A (Formula in SQL) (Incorrect):SQLdoes not use formulas to define primary keys.

Option C (Bold typeface) (Incorrect):SQL syntax does not rely on text formatting.

Option D (Diamond symbol) (Incorrect):ER diagramsmight use symbols, but SQLdoes not use diamonds to indicate keys.

Thus, the correct answer isSQL keyword, as primary keys are explicitly defined using PRIMARY KEY.

Attributesin a databaserepresent the properties (names, values, or characteristics) of an entity.

Example Usage:

In aStudentstable, attributes might include:

StudentID (Primary Key), Name, Age, Major

Here,Name is an attributedescribing the entityStudent.

Why Other Options Are Incorrect:

Option A (Synonyms) (Incorrect):Synonyms in SQL allow different names for the same object but arenot attributes.

Option C (Repositories) (Incorrect):A repository stores data butdoes not define attributes.

Option D (Relationships) (Incorrect):Relationships defineconnections between entities, not their attributes.

Thus, the correct answer isNames, asattributes define entity properties.

Thefirst stepin database analysis isidentifying entities, which are thereal-world objectsthat need to be represented in the database.

Example Usage:

In a school system, the mainentitiescould be:

Students, Courses, Instructors

Why Other Options Are Incorrect:

Option A (Determine cardinality) (Incorrect):Determining relationships comesafteridentifying entities.

Option C (Draw an ER diagram) (Incorrect):ER diagramsvisualizeentities but arenot the first step.

Option D (Implement attributes) (Incorrect):Attributes aredefined afterentities are identified.

Thus, the correct answer isIdentify entities, asentities form the foundation of the databasemodel.