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Questions and Answers
What is a relational database management system (RDBMS)?
What is a relational database management system (RDBMS)?
- A system used to maintain relational databases (correct)
- A programming language for web development
- A model for data visualization
- A system used to maintain non-relational databases
Who proposed the relational model of data in 1970?
Who proposed the relational model of data in 1970?
- Steve Jobs
- Tim Berners-Lee
- Bill Gates
- E. F. Codd (correct)
What does SQL stand for in the context of relational databases?
What does SQL stand for in the context of relational databases?
- Structured Query Language (correct)
- Simple Query Logic
- Standardized Question Logic
- Structured Question Language
How many rules did Codd define for a relational database system?
How many rules did Codd define for a relational database system?
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What term did Codd introduce in his research paper at IBM in 1970?
What term did Codd introduce in his research paper at IBM in 1970?
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Study Notes
Relational Database Management System (RDBMS)
- A relational database management system (RDBMS) is a type of database management system that stores data in a structured format using rows and columns.
- RDBMS allows users to create, read, update, and delete data, ensuring data integrity and supporting complex queries.
Relational Model
- The relational model of data was proposed by Edgar F. Codd in 1970.
- Codd's model introduced a systematic way of organizing data based on mathematical set theory and first-order predicate logic.
SQL (Structured Query Language)
- SQL stands for Structured Query Language, the standard programming language used for managing and manipulating relational databases.
- SQL is used for executing queries, retrieving data, and performing operations on the data stored in an RDBMS.
Codd's Rules
- Edgar F. Codd defined 12 rules (numbered zero to eleven) for an RDBMS to qualify as relational, serving as a guideline for what constitutes a true relational database.
Codd's Contribution
- The term "relational" was introduced by Codd in his research paper at IBM in 1970, laying the foundation for relational database technology.
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