Relational operations Study guides, Revision notes & Summaries
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![ICT2621 2023 Assignment 3 solution](/docpics/3053961/64ae9a13490cb_3053961_121_171.jpeg)
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ICT2621 2023 Assignment 3 solution
- Other • 8 pages • 2023
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ICT2621 2023 Assignment 3 solution 
Questions: 
Question 1 
NB: When drawing data flow diagrams (DFDs), use the Gane and Sarson 
symbols/notation set. 
1.1 Draw, name and describe the four symbols used in a data flow diagram (DFD). You 
may use a table to present your answer. 
(6) 
1.2 Briefly describe the following with respect to DFDs: 
1.2.1 Levelling(2) 
1.2.2 Balancing(2) 
1.2.3 Data dictionary(2)1.3 Draw a diagram of an example of each of the following showing the process, and the 
input(s...
![WGU D426 (Latest 2023/ 2023 Update) Data Management Foundations Exam| Guide with Questions and Verified Answers|100% Correct| Grade A](/docpics/3878162/655d0debdaa3b_3878162_121_171.jpeg)
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WGU D426 (Latest 2023/ 2023 Update) Data Management Foundations Exam| Guide with Questions and Verified Answers|100% Correct| Grade A
- Exam (elaborations) • 59 pages • 2023
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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? 
 
 ...
![Nursing Informatics Certification Exam, ANCC Informatics, ANCC Nursing Informatics Certification Review 629 Questions with Answers,100% CORRECT](/docpics/4996269/661adabdcfba4_4996269_121_171.jpeg)
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Nursing Informatics Certification Exam, ANCC Informatics, ANCC Nursing Informatics Certification Review 629 Questions with Answers,100% CORRECT
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Nursing Informatics Certification Exam, ANCC Informatics, ANCC Nursing Informatics Certification Review 629 Questions with Answers 
 
Meta structure of NI - CORRECT ANSWER The ability of the nurse to utilize data, information, and knowledge to make wise clinical decisions. 
 
Definition of Nursing Informatics - CORRECT ANSWER A speciality that integrates nursing science with multiple information and analytical sciences to identify, define, manage and communicate data, information, knowledge and ...
![D427 - Vocab: Data Management Applications || with 100% Verified Solutions.](/docpics/5395711/664d5c317ae31_5395711_121_171.jpeg)
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D427 - Vocab: Data Management Applications || with 100% Verified Solutions.
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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...
![WGU C170 Study Guide (Latest 2024/ 2025 Update) Data Management Applications Exam| 100% Correct| Grade A](/docpics/4252255/65a7a51380b46_4252255_121_171.jpeg)
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WGU C170 Study Guide (Latest 2024/ 2025 Update) Data Management Applications Exam| 100% Correct| Grade A
- Exam (elaborations) • 31 pages • 2024
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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...
![EECS 484 F19 - Homework 4 University of Michigan EECS 484](/docpics/6425f67b5c6c0_2536046.jpg)
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EECS 484 F19 - Homework 4 University of Michigan EECS 484
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EECS 484 F19 - Homework 4 
Deadline -- 6:00 PM on Tuesday, Nov 26th, 2019 
Deliverables: You need to submit all your solutions in a single PDF on Gradescope. 
Your solutions can be either handwritten or created electronically, as long as they are 
clear. 
This homework is to be done in teams of 2 students; individual work is permitted, but 
not recommended. Both members of each team will receive the same score; as such, it 
is not necessary for each team member to submit the assignment. 
Create ...
![BSG COMPREHENSIV E EXAM TEST QUESTIONS AND VERIFIED 100% SOLUTIONS Brinker International operates restaurants in several different segments of the casual dining market. This is a. a relatively high level of diversification. b. an example of product di](/docpics/3134554/64c12e371cab5_3134554_121_171.jpeg)
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BSG COMPREHENSIV E EXAM TEST QUESTIONS AND VERIFIED 100% SOLUTIONS Brinker International operates restaurants in several different segments of the casual dining market. This is a. a relatively high level of diversification. b. an example of product di
- Exam (elaborations) • 14 pages • 2023
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BSG 
COMPREHENSIV 
E EXAM TEST 
QUESTIONS AND 
VERIFIED 100% 
SOLUTIONS 
Brinker International operates restaurants in several different segments of the 
casual dining market. This is 
a. a relatively high level of diversification. 
b. an example of product diversification. 
c. unlikely to reduce variability in the firm's profitability since the restaurants are 
all in the casual dining category. 
d. an example of related linked diversification. 
-ANSWER- b. an example of product diversific...
![MTA Exam Questions with 100% Correct Answers 2022-23](/docpics/63a99751a3161_2201229.jpg)
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MTA Exam Questions with 100% Correct Answers 2022-23
- Exam (elaborations) • 22 pages • 2022
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b. Add a reference to the web service in the application. - Correct answer-How should 
you configure an application to consume a web service? 
a. Add the web service to the development computer. 
b. Add a reference to the web service in the application. 
c.Add a reference to the application in the web service. 
d.Add the web service code to the application. 
d. server-side - Correct answer-You are writing a web application that processes room 
reservation requests. You need to 
verify that the r...
![WGU - D426: Objective Assessment Questions and Answers Already Passed](/docpics/4463622/65c67bac30d38_4463622_121_171.jpeg)
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WGU - D426: Objective Assessment Questions and Answers Already Passed
- Exam (elaborations) • 27 pages • 2024
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WGU - D426: Objective Assessment 
Questions and Answers Already Passed 
 
Database Application Software that helps business users interact with database systems. 
 
Database Administrator Responsible for securing the database system against unauthorized 
users. A database administrator enforces procedures for user access and database system 
availability. 
 
Authorization Many database users should have limited access to specific tables, columns, or 
rows of a database. Database systems authoriz...
![WGU D426 Data Management Foundations Final Exam (New 2023/ 2023 Update) | Grade A | Questions and Verified Answers|100% Correct](/docpics/3926486/65670d1192ee9_3926486_121_171.jpeg)
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WGU D426 Data Management Foundations Final Exam (New 2023/ 2023 Update) | Grade A | Questions and Verified Answers|100% Correct
- Exam (elaborations) • 40 pages • 2023
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WGU D426 Data Management Foundations 
Final Exam (New 2023/ 2023 Update) | Grade 
A | Questions and Verified Answers|100% 
Correct 
 
QUESTION 
 One-to-Many 
 
 
Answer: 
This is the most common relationship. Associates ONE record in ONE table with MULTIPLE 
records in another table. 
 
 
 
QUESTION 
 One-to-One 
 
 
Answer: 
Associates only ONE record on one table with ONE record on another table. 
 
 
 
QUESTION 
 Data Manipulation Language (DML) 
 
 
Answer: 
What language am I? 
 
All...
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