Composite primary key - Study guides, Class notes & Summaries

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...

Chapter 3 Database Design Exam Questions And Correct Answers All 100% Verified Primary Key - Answer -Is a column, or a group of columns, used to identify a row. The primary key is usually the tables 1st column, and appears on the left of table diagrams, but the position is not significant to the database. * often, primary key values are used in the WHERE clause to select a specific row. * Primary keys must be: - Answer -- Unique: this rule ensures that each value identifies at most one...

C170 Data Management Application Questions and Answers Graded A+ AREA In DB2, a named section of permanent storage space that is reserved to store the database. associative entity See composite entity. Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:07 / 0:15 Full screen bridge entity See composite entity. candidate key A minimal superkey; that is, a key that does not contain a subset of attributes that is itself ...

business rule Ans- A description of a policy, procedure, or principle within an organization. For example, a pilot cannot be on duty for more than 10 hours during a 24-hour period, or a professor may teach up to four classes during a semester. candidate key Ans- A minimal superkey; that is, a key that does not contain a subset of attributes that is itself a superkey. See key. composite entity Ans- An entity designed to transform an M:N relationship into two 1:M relationships. The co...

WGU C175 Data Management – Foundations Exam| Quiz Bank (Latest 2023/ 2024) 300+ Questions and Verified Answers- 100% Correct Q: What are the requirements of first normal form? a) No value in a table should depend on only part of a key that can be used to uniquely identify a row b) Values in each cell should be atomic and tables should have no repeating groups. c) Values should not be stored if they can be calculated from another non-key field. d) all of the above Answer: b Q...

WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA EXAM ACTUAL EXAM 2 LATEST VERSIONS 300 QUESTIONS AND CORRECT ANSWERS ASSURED A+. VERSION A What does modality refer to? How does it appear on ER diagram? - ANSWERRefers to the MINIMUM number of times an instance in one entity can be associated with instance of another entity (minima) Appears as a 0 or 1 on the relationship line, next to cardinality Define: Referential Integrity - ANSWER- Requires that ALL foreign key values must either be fully ...

WGU C170 Data Management Application. Exam Review. Graded A+ AREA - -In DB2, a named section of permanent storage space that is reserved to store the database. associative entity - -See composite entity. bridge entity - -See composite entity. candidate key - -A minimal superkey; that is, a key that does not contain a subset of attributes that is itself a superkey. See key. closure - -A property of relational operators that permits the use of relational algebra operators on existing ta...

North Carolina Practice Locksmith Exam Questions And Answers With Verified Study Solutions 1. the number(s) which represent(s) the dimensions of the key 2. the actual cut(s) or combination of a key - ANS Bitting . a designation, unrelated to the bitting, assigned to a particular key combination for future reference when additional keys or cylinders may be needed - ANS Blind Code n. a hand held key bitting punch, often incorporating a trigger-like handle - ANS Clipper ...

WGU C175 Data Management Foundations Test Questions and Answers 2024/2025 Graded A+. They can serve as a communication tool between the users and designers. Which of the following is true of business rules? entity A(n) _______ is anything about which data are to be collected and stored. XML/Hybrid data model Oracle 11g is an example of the _______. entity instance Each row in the relational table is known as a(n) relational data model MySQL is an example of the _______. attribute A(n)...

Data Management Applications C170 What is a table? A table is a persistent representation of a logical relation that is a relation whose contents can be saved for permanent use. What are the characteristics of a relational table? The characteristics of a relational table are that a table is perceived as a two-dimensional structure composed of rows and columns, each row (tuple) represents a single entity occurrence within the set, each column represents an attribute, each column has a dis...