C170 - Study guides, Class notes & Summaries

WGU C170 Study Guide (Latest 2024/ 2025 Update) Data Management Applications Exam| 100% Correct| Grade A Q: domain: In data modeling, the construct used to organize and describe an attribute's set of possible values. Q: entity integrity Answer: The property of a relational table that guarantees each entity has a unique value in a primary key and that the key has no null values. Q: equijoin Answer: A join operator that links tables based on an equality condition tha...

WGU C170 - Data Management – Applications Study guide solution

WGU C170 EXAM QUESTIONS WITH CORRECT ANSWERS A salesperson is authorized to sell many products and a product can be sold by many salespersons. Which kind of binary relationship does this scenario describe? One-to-one One-to-many Many-to-many One-to-one binary - CORRECT ANSWERS Many-to-many Which two examples are attributes? Choose 2 answers A person attending a meeting An employee number A sales meeting A meeting code - CORRECT ANSWERS ...

_____ functions extract a value of a given data type and convert it to the equivalent value in another data type. Ans-Conversion _____ is a relational set operator. Ans-MINUS _____ is a string function that returns the number of characters in a string value. Ans-LENGTH "Union compatible" means that the _____. Ans-names of the relation attributes can be different, but the data types must be alike A _____ is a query inside a query. Ans-subquery A _____ join returns rows with m...

WGU C170 Exam (Latest 2024/ 2025 Update) Data Management Applications Exam| 100% Correct| Grade A Q: What are homonyms and synonyms, and why should they be avoided in database design? Answer: Homonyms appear when more than one attribute has the same name. Synonyms exist when the same attribute has more than one name. Avoid both to avoid inconsistencies. Q: How would you implement a 1:M relationship in a database composed of two tables? Answer: A car is owned just by one custome...

WGU C170 DATA MANAGEMENT APPLICATIONS OA EXAM AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 400 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) ALREADY GRADED A+.

The _____ data type is considered compatible with VARCHAR(35). Ans- CHAR(15) How many rows would be returned from a cross join of tables A and B, if A contains 8 rows and B contains 18? Ans- 144 Oracle uses the _____ function to extract the various parts of a date. Ans- TO_CHAR A(n) _____ join returns not only the rows matching the join condition (that is rows, with matching values in the commun columns) but also the rows with unmatched values. Ans- outer A _____ is a query inside ...

AREA Ans- In DB2, a named section of permanent storage space that is reserved to store the database. candidate key Ans- A minimal superkey; that is, a key that does not contain a subset of attributes that is itself a superkey. closure Ans- A property of relational operators that permits the use of relational algebra operators on existing tables (relations) to produce new relations. composite entity Ans- An entity designed to transform an M:N relationship into two 1:M relationships...

Domain In data modeling, the construct used to organize and describe an attribute's set of possible values. Primary key (PK) An identifier composed of one or more attributes that uniquely identifies a row. Also, a candidate key selected as a unique entity identifier. A minimal superkey. Key One or more attributes that determine other attributes. Determination The role of a key. In the context of a database table, the statement "A determines B" indicates that knowing the value of attr...

WGU C170 Data Management Application Questions with 100% Correct Answers | Latest Version 2024 | Verified