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2.14- All Keys In ER Model | Super key, Candidate key, alternate key, Primary Key, Foreign Key in ER Please Follow Playlist For Complete Chapter - Link Is Under Description PLAYLIST: DBMS - Data Base Management System Tutorials In Hindi | GATE- NET- DBMS Lectures in Hindi 🤍 dbms tutorials, dbms tutorials in hindi, dbms lectures, dbms lectures in hindi, dbms for begineers, gate dbms lectures in hindi, ugc net dbms lectures in hindi, gate dbms lectures, ugc net dbms lectures, gate dbms tutorials in hindi, ugc net dbms tutorials in hindi, gate dbms tutorials, ugc net dbms tutorials, #gatedbmslecturesinhindi, #ugcnetdbmslecturesinhindi, #gatedbmslectures, #ugcnetdbmslectures, Keys A key is an attribute or set of attributes that is used to identify data in entity sets. The attributes which are used as key are known as key attributes. Rest of all are known as Non-key attributes. Types of Keys There are many keys that are used in the different tables. These are as follows: 1. Super Key : A super key is a set of collection of one or more than one attributes that can identify data uniquely. Any entity set has more than one super key. Department Ex. In entity set Employee, shown in Figure 2.9(a), Super Keys are (a) (ID, Name, Salary, Reg. No.) (b) (ID, Name, Reg. No.) (c) (ID) etc. All combinations can identify data uniquely. 2. Candidate Key : The minimal super key is known as candidate key. Consider a super key and then take all of its proper subsets. If no one of the proper subsets are super key. Then this super key is taken as candidate key. Ex. ID and Reg. No. are candidate key Example: Find all possible candidate keys for the following relation based on its current tuples: E-R and EER Models 51 A B C D a1 b1 c1 d1 a1 b2 c2 d1 a2 b2 c1 d1 a2 b1 c2 d1 Ans. There are three candidate keys of this relation {A, B}, {A, C}, {B, C} Example: Given a relation Students as follows: Students (SSN, Name, Home_Address, Birthdate, GPA). (a) Determine some candidate keys of this relation? (b) Determine a super key that is not a candidate key? Ans. (a) {SSN}, {Name, Home_Address, Birthdate} are candidate keys. (b) {SSN, Name} is a super key but not a candidate key. 3. Primary Key : An attribute which identifies data uniquely is known as PrimaryKey. OR The term Primary Key is used to denote Candidate key. Any entity set can have more than one Candidate key but only one Primary Key. Ex. In entity set Employee, either Reg. No. is primary key or ID is primary key. 4. Alternate Keys : All the candidate keys other than Primary Key are known as Alternate Keys. Ex. If you take ID as Primary Key. Then, Reg. No. is an alternate key. 5. Secondary Key : An attribute or set of attributes which doesn’t identify data uniquely but identifies a group of data is known as secondary key. Ex. Name, Salary and Department No. are all secondary keys. 6. Foreign Key : A foreign key is an attribute in any entity set which is also a Primary Key in any other entity set. Ex. Dept_ID: This is an attribute in entity set Employee and also a primary key in entity set Department. Thus, it is a foreign key in Employee. 2.10- Candidate Key In DBMS In Hindi | What Is Candidate Key In RDBMS in Hindi | GATE dbms lectures 🤍 2.11- Primary Key In DBMS In Hindi | What Is Primary Key In RDBMS in Hindi | GATE dbms lectures 🤍 2.12What Is Alternate Key & Composite Key In Dbms In Hindi - Alternate Key & Composite Key Hindi 🤍 2.13- Foreign Key In DBMS In Hindi | What IsForeign Key In DBMS in Hindi | NET GATE dbms lectures 🤍 Notes Link: 🤍
DBMS: Entity-Relationship (ER) Model Topics discussed: 1. Terminologies in relation to the ER Model: a. Entity. b. Attributes: • Composite vs Simple Attributes • Single-valued vs Multivalued Attributes • Derived vs Stored Attributes c. Complex Attributes. d. Null values. e. Entity Type, Entity Set. f. Key Attribute & Value Set of Attributes. Follow Neso Academy on Instagram: 🤍nesoacademy(🤍 Contribute: 🤍 Memberships: 🤍 Books: 🤍 Website ► 🤍 Forum ► 🤍 Facebook ► 🤍 Twitter ► 🤍 Music: Axol x Alex Skrindo - You [NCS Release] #DBMSByNeso #DBMS #ERModel #EntityRelationshipModel
#DBMSKeys #SuperKey #CandidateKey #PrimaryKey #ForeignKey #AlternateKey #CompositeKey #Keys in DBMS This video explains: Keys in DBMS or DBMS Keys or Types of Keys in DBMS or Keys in ER Model, DBMS Keys in Hindi, Keys in DBMS in hindi or Types of Keys in DBMS: Super Key, Candidate Key, Primary Key, Foreign Key, Alternate Key and Composite Key This is a lecture 14 for Database Management System (DBMS) unit 1 according to CSVTU bhilai. For more videos on DBMS follow the given link : DBMS Playlist: 🤍 ER Model Playlist: 🤍 Relational Model Playlist: 🤍 SQL Playlist: 🤍 Lecture 1: Database Management System (DBMS) Introduction 🤍 Lecture 2: View of Data in DBMS | Three Levels of Abstraction | Schema & Instance | Data Independence 🤍 Lecture 3: Data Models | Relational Model | ER Model |Object Based Model | Semi-Structured Model 🤍 Lecture 4: Database Languages | DDL, DML, DCL, TCL 🤍 Lecture 5: Database Access from Application Programs | SQL | APIs - ODBC & JDBC | Embedded SQL 🤍 Lecture 6: Database Users and Administrators 🤍 Lecture 7: Transaction Management & Storage Management 🤍 Lecture 8: Database System Structure, Query Processor, Storage Manager 🤍 Lecture 9: DBMS Architecture: 1-tier 2-tier 3-tier Architecture 🤍 Lecture 10: History of Database Systems 🤍 Lecture 11: Introduction to ER Model, Entity-Attributes-Relationships 🤍 Lecture 12: Types of Attributes in ER Model 🤍 Lecture 13: Mapping Cardinalities & Participation Constraints 🤍 Lecture 14: Keys in DBMS - Super Key, Candidate Key, Primary Key, Foreign Key, Alternate Key, Composite Key 🤍 Lecture 15: Strong Entity & Weak Entity in DBMS 🤍 Lecture 16: Extended ER Features: Generalization, Specialization, Aggregation in DBMS 🤍 Lecture 17: Converting ER Diagrams to Tables with Examples | Rules 🤍 Lecture 18: Questions on Conversion of ER Diagrams to Tables | Part 1 - 🤍 Lecture 19: Questions on Conversion of ER Diagrams to Tables | Part 2 -🤍 Lecture 20: How to draw ER diagram| ER Diagram for Banking System | ER Notations 🤍 Lecture 21: Relational Model in DBMS | RDBMS 🤍 Lecture 22: Relational Model Mathematical Structure in DBMS 🤍 Lecture 23: Integrity Constraints 🤍 Welcome to this youtube channel "Shanu Kuttan CSE Classes " by Shanu Kuttan. This is a technical educational channel for subjects of computer science and engineering subjects (CSE) as per university syllabus and also cover GATE topics. It provides Computer Science and engineering classes in Hindi. This channel’s video helps Computer Science and Engineering students to understand different subjects like Computer System Architecture (CSA) i.e. Computer Organization and Architecture (COA) or simply Computer Architecture, Database Management System (DBMS), Advance Computer Architecture (ACA), Parallel Processing and Computing (PPC) unit wise as per the CSVTU syllabus i.e. Chhattisgarh Swami Vivekanand Technical University, Bhilai Contact Link in Facebook : 🤍
Learn how to create an Entity Relationship Diagram in this tutorial. We provide a basic overview of ERDs and then gives step-by-step training on how to make an ER diagram with correct cardinality. Entity Relationship Diagrams are comprised of 3 main categories: entities, attributes, and relationships. Entities are objects or concepts that are associated with important data—like a customer, order, or product. Attributes represent properties or traits of an entity, such as a customer’s phone number or home address. Relationships demonstrate the link between entities. Another main aspect of of ERD's is cardinality, which further defines the relationship between entities in a numerical way. Certain symbols signify the minimum and maximum relationship between different entities. Additional ERD information: 🤍 —— Learn more and sign up: 🤍 Follow us: Facebook: 🤍 Twitter: 🤍 Instagram: 🤍 LinkedIn: 🤍
See complete series of DBMS: 🤍 In this lecture, I have described all types of keys(Super key, Candidate Key, Primary Key, Alternate Key, Secondary Key) in DBMS with examples. Discussed all the important points about keys in DBMS, See Complete Playlists: Placement Series: 🤍 Data Structures and Algorithms: https: 🤍 Dynamic Programming: 🤍 Operating Systems: //🤍youtube.com/playlist?list=PLdo5W4Nhv31a5ucW_S1K3-x6ztBRD-PNa Connect & Contact Me: Facebook: 🤍 Quora: 🤍 Instagram: 🤍 #keysindbms #typesofkeysindbms #DBMSnotes #ugcnet #gatelectures
For complete DBMS tutorial: 🤍 This video covers the different types of DBMS Keys like Super Key, Candidate Key, Primary Key, Foreign Key, Alternate Key, Composite & Compound Key and Surrogate Key with complete explanation and example. Introduction to Normalization: 🤍 First Normal Form: 🤍 Second Normal Form: 🤍 Third Normal Form: 🤍 BCNF: 🤍 Fourth Normal Form: 🤍 Fifth Normal Form: 🤍 If you LIKE this video, give it a thumbs up and do SUBSCRIBE to our channel. Our website: 🤍 Facebook: 🤍 Twitter: 🤍
Learn how to create an Entity Relationship Diagram with Primary Keys, Foreign Keys, and Composite Keys in this advanced ERD tutorial. We provide step-by-step training on how to identify these different keys, as well as helpful information on bridge tables, data types, and how your ER Diagram relates to a database management system. A Primary Key is an attribute (or field) that uniquely identifies every record in a certain table. There’s one Primary Key per entity, and they must be unique, never-changing, and never-null. You note a Primary Key in your Entity Relationship Diagram with “PK” to the left of the appropriate attribute. A Foreign Key is an attribute in one entity that links to the Primary Key of another entity. Consequently, they enable relationships between those entities. There can be multiple foreign keys per entity, or none at all. You note a Foreign Key in your ERD with “FK” to the left of the appropriate attributes. —— Learn more and sign up: 🤍 Follow us: Facebook: 🤍 Twitter: 🤍 Instagram: 🤍 LinkedIn: 🤍
Subscribe to our new channel:🤍 In this video there is best explanation of ER model i.e. Entity relationship model in database. It is conceptual model and very important for competitive exams like GATE, UGC NET, NIELIT, PSUs, IT Officer etc. and College/University exams. DBMS Notes: File 1: 🤍 File 2: 🤍 Contributed by: Anurag Singhal ► Database Management System(Complete Playlist): 🤍 Other subject-wise playlist Links: ►Design and Analysis of algorithms (DAA): 🤍 ►Computer Architecture (Complete Playlist): 🤍 ► Theory of Computation 🤍 ►Artificial Intelligence: 🤍 ►Computer Networks (Complete Playlist): 🤍 ►Operating System: 🤍 ►Structured Query Language (SQL): 🤍 ►Discrete Mathematics: 🤍 ►Compiler Design: 🤍 ►Number System: 🤍 ►Cloud Computing & BIG Data: 🤍 ►Software Engineering: 🤍 ►Data Structure: 🤍 ►Graph Theory: 🤍 ►Programming in C: 🤍 ►Digital Logic: 🤍 - Our social media Links: ► Subscribe to us on YouTube: 🤍 ►Subscribe to our new channel: 🤍 ► Like our page on Facebook: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Telegram: 🤍 ►For Any Query, Email us at: gatesmashers2018🤍gmail.com ►Be a Member & Give your Support on the below link: 🤍 #ERmodel#entityRelationshipmodel#DBMS
2.9- Keys And Types Of Keys- Super Key In ER Model In DBMS In Hindi | Super Key In DBMS Please Follow Playlist For Complete Chapter - Link Is Under Description PLAYLIST: DBMS - Data Base Management System Tutorials In Hindi | GATE- NET- DBMS Lectures in Hindi 🤍 dbms tutorials, dbms tutorials in hindi, dbms lectures, dbms lectures in hindi, dbms for begineers, gate dbms lectures in hindi, ugc net dbms lectures in hindi, gate dbms lectures, ugc net dbms lectures, gate dbms tutorials in hindi, ugc net dbms tutorials in hindi, gate dbms tutorials, ugc net dbms tutorials, #gatedbmslecturesinhindi, #ugcnetdbmslecturesinhindi, #gatedbmslectures, #ugcnetdbmslectures, A key is an attribute or set of attributes that is used to identify data in entity sets. The attributes which are used as key are known as key attributes. Rest of all are known as Non-key attributes. 2.6.1 Types of Keys There are many keys that are used in the different tables. These are as follows: 1. Super Key : A super key is a set of collection of one or more than one attributes that can identify data uniquely. Any entity set has more than one super key. Employee Reg. No ID Name Salary Dept-ID S1D 1 Mohan 1500 10 A25 2 Sohan 2000 30 33Z 3 Vikas 3000 20 Z4X 4 Madhu 1000 10 A5C 5 Sonal 5000 20 (a) Department Dept-ID Dept-Name 10 Sales 20 Marketing 30 Development (b) FIGURE 2.9. Entity sets employee and department. Ex. In entity set Employee, shown in Figure 2.9(a), Super Keys are (a) (ID, Name, Salary, Reg. No.) (b) (ID, Name, Reg. No.) (c) (ID) etc. 2.6- Degree Of Relationship Sets In ER Diagram In DBMS In Hindi | Binary & Ternary Relationship Set 🤍 2.7- Mapping Constraints In ER Diagram In DBMS | Mapping Cardinality Or Cardinality Ratios In DBMS 🤍 2.8- Participation Constraints In ER Diagram In DBMS In Hindi | Partial And Total Participation 🤍 Notes Link: 🤍
What is key, types of keys
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DBMS: Keys in RDBMS Topics discussed: 1. Explanation about the need for having keys in tables. 2. Various keys involved in DBMS. 3. Super key with example. 4. Candidate key with example. 5. Primary key with example. 6. Alternate key with example. 7. Unique key with example. 8. Foreign key with example. Follow Neso Academy on Instagram: 🤍nesoacademy(🤍 Contribute: 🤍 Memberships: 🤍 Books: 🤍 Website ► 🤍 Forum ► 🤍 Facebook ► 🤍 Twitter ► 🤍 Music: Axol x Alex Skrindo - You [NCS Release] #DBMSByNeso #DBMS #KeysInDBMS
DBMS - Entity Relationship Diagram Watch more Videos at 🤍 Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
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#ERdiagramToRelationalTable, #Database, #ERdiagrams, #EntityRelationalDiagrams
How To Draw ER Diagram Are you wondering how online websites and mobile apps, store, retrieve and show different data types and the volume of data. This is because of the creation of Database which is an organized collection of information where data are stored, managed, updated, and retrieved.Databases have so many elements and understanding how they interact with each other is complex. This is where ER Diagrams are used. What an ER Diagram is and why it is needed? ER stands for Entity-Relationship (ER) Diagram, It is also known as ERD. It is a visual representation of how tables (also known as entities) in a system are related to each other.One advantage of using ER Diagrams is that, it makes it easier for business folks to understand the data because it is presented in a graphical manner.In business analysis, ERD is a vital part of designing software systems. ERDs are mainly used by analysts in designing database, especially when handling complex data. It has 3 Key components 1. Entity 2. Attribute 3. Relationship Business Analysis Requirements Checklist (With 700+ Questions to Ask in 18 Organized Requirements Checklists) 🤍 CBAP Mock Exam 🤍 ECBA Mock Test 🤍 The Business Analyst Blueprint (An online and interactive business analyst certification program) 🤍 CCBA/CBAP Training 🤍 BA Job Interview Preparation 🤍 Beginner BA Training Program 🤍 Email Communication Templates (With 32 Simple, Copy-and-Paste Templates Specifically for Business Analysts) 🤍 Visual Model Sample Pack (From UML Diagrams to Whiteboard Drawings... 22 Real-World Swipe Files From the Working Files of a BA) 🤍 Business Analyst Template Toolkit (With Annotated Templates Handling Common BA Work Scenarios) 🤍 Project Prioritization Organizer (The Project Prioritization Organizer will help you bring order to the chaos by gaining buy in from your sponsors and clearly prioritizing projects, which means your organization) 🤍 Icon made by Parzival’ 1997 from 🤍flaticon.com Icon made by Freepik from 🤍flaticon.com Icon made by juicy_fish from 🤍flaticon.com Icon made by Becris from 🤍flaticon.com Icon made by Flat Icons from 🤍flaticon.com Icon made by Eucalyp from 🤍flaticon.com Icon made by noomtah from 🤍flaticon.com Icon made by DailyPm Studio from 🤍flaticon.com
What is primary key in ER diagram? May 10, 2019 Primary Key is one of its attributes which helps to identify its member. In a weak entity set, it is a combination of primary key and partial key of the strong entity set. In the ER diagram the relationship between two strong entity set shown by using a diamond symbol. ·········· “Be competent, be more skilful than others. Here you will find the answer to all of your questions.” ✋ The purpose of our channel is to create EDUCATIONAL content. That was our intention with this video as well. We would like to give you COMPLETE INFORMATION on the subject, so unfortunately we can also discuss elements that may be hurtful to people.
DBMS: Concept of Relationships in ER Diagram Topics discussed: 1. Definition of Relationship & example. 2. Degree of Relationship: a. Unary relationship b. Binary relationship c. Ternary relationship 3. Relationship Constraints a. Cardinality Ratio (one to one, one to many, many to one & many to many). b. Participation Constraints (Total & partial participation). 4. ER Diagram for COMPANY database. 5. Attributes of Relationship Types. 6. Role Names & Recursive Relationships. 7. Alternative Notations for ER Diagrams. 8. Enhanced ER (EER) Model: a. Generalization b. Specialization Follow Neso Academy on Instagram: 🤍nesoacademy(🤍 Contribute: 🤍 Memberships: 🤍 Books: 🤍 Website ► 🤍 Forum ► 🤍 Facebook ► 🤍 Twitter ► 🤍 Music: Axol x Alex Skrindo - You [NCS Release] #DBMSByNeso #DBMS #ERDiagram
This video explains how you can convert an Entity Relational diagram into the Relational Data Model. Link to conversion guide: 🤍 PLEASE NOTE at 11:00: The conversion of the multi-valued attribute of the Department is NOT being correctly mapped in the video. departmentID should be put as a Foreign Key on the Locations table and together departmentID and locationID form the combined Primary Key as specified in the conversion guide.
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Subscribe to our new channel:🤍 In this video You will be able to understand foreign key from scratch. Also What is referential integrity and how we maintain it in database. All points are explained with most suitable examples. Student always find this topic difficult but after watching this video all the doubts will be clear. ►Foreign Key part-2: 🤍 DBMS Notes: File 1: 🤍 File 2: 🤍 Contributed by: Anurag Singhal ► Database Management System(Complete Playlist): 🤍 Other subject-wise playlist Links: ►Design and Analysis of algorithms (DAA): 🤍 ►Computer Architecture (Complete Playlist): 🤍 ► Theory of Computation 🤍 ►Artificial Intelligence: 🤍 ►Computer Networks (Complete Playlist): 🤍 ►Operating System: 🤍 ►Structured Query Language (SQL): 🤍 ►Discrete Mathematics: 🤍 ►Compiler Design: 🤍 ►Number System: 🤍 ►Cloud Computing & BIG Data: 🤍 ►Software Engineering: 🤍 ►Data Structure: 🤍 ►Graph Theory: 🤍 ►Programming in C: 🤍 ►Digital Logic: 🤍 - Our social media Links: ► Subscribe to us on YouTube: 🤍 ►Subscribe to our new channel: 🤍 ► Like our page on Facebook: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Telegram: 🤍 ►For Any Query, Email us at: gatesmashers2018🤍gmail.com ►Be a Member & Give your Support on the below link: 🤍 #foreignKey#Constraints#ReferentialIntegrity#DBMS#GATE#ugcNet
What is key and its type? What do you mean by keys? How many keys are in DBMS? #dbms #keys #sql Notes: 🤍 We already uploaded these subject videos : 1. C Programming Tutorials. 2. C Programming Language Tutorials. 3. Data Structure Tutorials 4. Operating System Tutorials 5. Digital Electronics 6. Java Tutorials 7. Website Designing Tutorials 8. DBMS Tutorials More videos : Data Structure Tutorial Playlist: youtube.com/watch?v=4ldqzCsEJHI&list=PLqcuf9-ILPYBVVlhHYf6mrjZOGeoBkVVX Tutorials Playlists: 🤍 lectures CS #IT cse Gyan NET&JR Simple & Snippets I Technologies Education 4u For you Hindi Easy Engineering Classes Last Moment Tuition class java tutorials #BTech syllabus #polytechnic course IT #learncode #coding #code #digital #electronics Hindi #CSE #Gyan #Tutorial #btech #polytechnic #hindi Please Like Share and Subscribe CSE Gyan Cs Engineering Gyan Teacher: Kailash Joshi Editor: Bipin Chandra Thank You
Some formatting suggestions and relationship management considerations when working with ERDs in MySQL Workbench.
Dr. Soper demonstrates how to create entity-relationship diagrams (ERDs) using Draw.io. Topics covered include creating entities and attributes, defining primary and foreign keys, marking attributes as required, creating and modifying relationship lines, changing cardinalities, creating weak entities, and marking relationships as non-identifying.
#PrimaryKey #ForeignKey #DatabaseTutorial #EasyDatabaseTutorial Primary Key Foreign key tutorial
The relationship in ERD not just showing the relationship between two tables. By linking up the referenced column it also can point out the exact place where they are related, and make your diagram nicer to read. This video will show you how to make your relationships in ERD pointing to the referenced columns in the related tables. Visual Paradigm product page: 🤍 FREE Evaluation available here: 🤍 Tutorial: Draw Entity Relationship Diagram (ERD) 🤍 Tutorial: Provide Default Data for Database Design 🤍
In this video we will learn:- - Types of Attributes in DBMS. Simple Attribute. Composite Attribute. Single Valued Attribute. Multi Valued Attribute. Stored Attribute. Derived Attribute. - Introduction to Entity Relationship (ER) diagram. - Concept of Key & non-Key Attribute.
Subscribe to our new channel:🤍 You will get full knowledge of types of attributes in ER model. Single, Multi valued, Simple, Complex, Composite, Derived Attributes. 0:00 - Introduction 0:28 - Attribute 1:02 - Single vs Multivalued 3:07 - Simple vs Composite 4:31 - Stored vs Derived 7:00 - Key vs Non-Key 10:22 - Required vs Optional DBMS Notes: File 1: 🤍 File 2: 🤍 Contributed by: Anurag Singhal ► Database Management System(Complete Playlist): 🤍 Other subject-wise playlist Links: ►Design and Analysis of algorithms (DAA): 🤍 ►Computer Architecture (Complete Playlist): 🤍 ► Theory of Computation 🤍 ►Artificial Intelligence: 🤍 ►Computer Networks (Complete Playlist): 🤍 ►Operating System: 🤍 ►Structured Query Language (SQL): 🤍 ►Discrete Mathematics: 🤍 ►Compiler Design: 🤍 ►Number System: 🤍 ►Cloud Computing & BIG Data: 🤍 ►Software Engineering: 🤍 ►Data Structure: 🤍 ►Graph Theory: 🤍 ►Programming in C: 🤍 ►Digital Logic: 🤍 - Our social media Links: ► Subscribe to us on YouTube: 🤍 ►Subscribe to our new channel: 🤍 ► Like our page on Facebook: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Instagram: 🤍 ► Follow us on Telegram: 🤍 ►For Any Query, Email us at: gatesmashers2018🤍gmail.com ►Be a Member & Give your Support on the below link: 🤍 #attributeTypes#ERmodel#DBMS
This video explores logical database design (a pre-cursor to physical database design) and demonstrates the use of Entity Relationship Diagrams.
Review lecture on Transforming ERDs to Relational Schemas: Covered in this video: - composite attributes - multivalued attributes - Binary One-to-Many Relationship
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