Relational algebra - Guides d'étude, Notes de cours & Résumés

WGU C170 Chp 1, With Complete Verified Solution 2024. AREA in DB2, a named section of permanent storage space that is reserved to store the database. associative entity another name for composite entity, bridge entity or linking table bridge entity another name for composite entity, associative entity or linking table candidate key a minimal superkey; that is, a key that dows not contain a subset of attributes that is itself a superkey. closure A property of relational operators that p...

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...

WGU C170 Chp 1, With Complete Verified Solution 2024. AREA in DB2, a named section of permanent storage space that is reserved to store the database. associative entity another name for composite entity, bridge entity or linking table bridge entity another name for composite entity, associative entity or linking table candidate key a minimal superkey; that is, a key that dows not contain a subset of attributes that is itself a superkey. closure A property of relational operators that p...

1. The DBMS acts as an interface between what two components of an enterprise-class database system? A. Database application and the database B. Data and the database C. The user and the database application D. Database application and SQL 2. Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM? A.IDMS B.DB2 C. dBase-II D.R: base 3. The following are components of a database except ________ . A. user data B. metadata C. r...

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

1. Select yearid, lgid, teamid, playerid and the number of home runs (HR) from the BATTING table. Π yearid, lgid, teamid, playerid, HR (Batting) 2. Modify the query in #1 so it also shows the number of hits that were for “extra bases” and the batting average (H/AB). The Extra Bases column must be calculated by adding the following columns together (2B, 3B and HR). Rename the derived column Extra Base Hits. Π yearid, lgid, teamid, playerid, HR (ρBatting_Avg/(H/AB) (ρExtra_Bases/(2B...

WGU C170 Chp 1, With Complete Verified Solution 2024. AREA in DB2, a named section of permanent storage space that is reserved to store the database. associative entity another name for composite entity, bridge entity or linking table bridge entity another name for composite entity, associative entity or linking table candidate key a minimal superkey; that is, a key that dows not contain a subset of attributes that is itself a superkey. closure A property of relational operators that p...

WGU C170 Chp 1, With Complete Verified Solution 2024. AREA in DB2, a named section of permanent storage space that is reserved to store the database. associative entity another name for composite entity, bridge entity or linking table bridge entity another name for composite entity, associative entity or linking table candidate key a minimal superkey; that is, a key that dows not contain a subset of attributes that is itself a superkey. closure A property of relational operators that p...

Database Management-Final Exam Guaranteed Success Relationship ️ Association between entities. Types of relationships: ️ One-to-many: Each rep is associated with many customers. Each customer is associated with a single rep. Database ️ A structure that can store information about different categories of information and relationships between those categories. Database Management System (DBMS) ️ A program, or collection of programs, through which users interact with a databas...

C170 - Applications - Data Management Questions and Answers Graded A+ FROM Clause that specifies the table or tables from which data is to be retrieved. Table Row Also called a tuple; represents a single entity occurrence within the entity set Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:08 / 0:15 Full screen Table Column Has a distinct name and represents an attribute Superkey An attribute or combination of at...