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

UTA INSY 3304 - Exam 2 - Chapter 7&9 Latest 2023 Graded A Data definition language DDL Data manipulation language DML CREAT SCHEMA AUTHORIZATION Creates a database schema CREATE TABLE Creates a new table in the user's databse schema NOT NULL Ensures that a column will not have null values UNIQUE Ensures that a column will not have duplicate values PRIMARY KEY Defines a primary key for a table FOREIGN KEY Defines a foreign key for a table DEFAULT Defines a default value for a column ( whe...

Complete Solutions Manual for Concepts of Database Management, 10th Edition by Lisa Friedrichsen, Lisa Ruffolo, Ellen Monk, Joy L. Starks, Philip J. Pratt, Mary Z. Last ; ISBN13: 9780357422083 (Full Chapters included Chapter 1 to 9)....1. Introduction to Database Management. 2. The Relational Model: Introduction, QBE, and Relational Algebra. 3. The Relational Model: SQL. 4. The Relational Model: Advanced Topics. 5. Database Design: Normalization. 6. Database Design: Relationships. 7. Datab...

Complete Test Bank for Concepts of Database Management, 10th Edition by Lisa Friedrichsen, Lisa Ruffolo, Ellen Monk, Joy L. Starks, Philip J. Pratt, Mary Z. Last ; ISBN13: 9780357422083. (Full Chapters included Chapter 1 to 9)....1. Introduction to Database Management. 2. The Relational Model: Introduction, QBE, and Relational Algebra. 3. The Relational Model: SQL. 4. The Relational Model: Advanced Topics. 5. Database Design: Normalization. 6. Database Design: Relationships. 7. Database Ma...

WGU C170 Study Guide (New 2024/ 2025Update) Data Management Applications Exam| 100% Correct| Grade A QUESTION predicate logic: Used extensively in mathematics to provide a framework in which an assertion (statement of fact) can be verified as either true or false. QUESTION primary key (PK) Answer: In the relational model, an identifier composed of one or more attributes that uniquely identifies a row. Also, a candidate key selected as a unique entity identifier. See ...

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...

database model correct answers A database model is a conceptual framework for database systems, with three parts: 1. Data structures that prescribe how data is organized. 2. Operations that manipulate data structures. 3. Rules that govern valid data. relational model correct answers The relational model is a database model based on a tabular data structure. The model was published in 1970 by E. F. Codd of IBM and released in commercial products around 1980. The data structure, operations, and...

TYPICAL QUESTIONS & ANSWERS OBJECTIVE TYPE QUESTIONS Each question carries 2 marks. Choose the correct or best alternative in the following: Q.1 In the relational modes, cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of constraints. Ans: A Q.2 Relational calculus is a (A) Procedural language. (B) Non- Procedural language. (C) Data definition language. (D) High level language. Ans: B ...

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...

WGU D426 (Latest 2023/ 2023 Update) Data Management Foundations Exam| Guide with Questions and Verified Answers|100% Correct| Grade A Q: What does SQL stand for? Answer: Structured Query Language. Q: What can SQL statements do? Answer: Read and write data, create and delete tables, and administer the database system. Q: What is big data? Answer: Massive volumes of online data, often with poorly structured or missing information. Q: What is NoSQL? ...

ATTRIBUTE - A TRAIT, QUALITY OR PROPERTY DESCRIDING A GEOGRAPHICAL FEATURE. A FACT DESCRIBING AN ENTITY IN A RELATIONAL DATA MODEL, EQUIVALENT TO THE COLUMN IN A RELATIONAL TABLE ANNOTATION - THE ALPHANUMERIC TEXT OR LABELS ON A MAP SUCH AS A STREET OR PLACE NAME AZIMUTH - THE HORIZONTAL DIRECTION OF A VECTOR, MEASURED CLOCKWISE IN DEGREES OF ROTATION FROM THE POSITIVE Y -AXIS, FOR EXAMPLE, A DEGREES ON A COMPASS BASE MANUSCRIPTS - A SET OF TOPOGRAPHIC DATA DISPLAYED IN MAP FORM PROVID...