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Questions and Answers
What is one reason for the importance of NoSQL DBMS?
What is one reason for the importance of NoSQL DBMS?
Which characteristic of data contributes to the rise of NoSQL DBMS?
Which characteristic of data contributes to the rise of NoSQL DBMS?
What type of data structure is associated with NoSQL DBMS?
What type of data structure is associated with NoSQL DBMS?
Which companies are mentioned as examples of using NoSQL DBMS?
Which companies are mentioned as examples of using NoSQL DBMS?
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What is the primary reason for the creation of NoSQL DBMS by large corporations?
What is the primary reason for the creation of NoSQL DBMS by large corporations?
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What is a key characteristic of data that Relational DBMS cannot support?
What is a key characteristic of data that Relational DBMS cannot support?
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What is the role of Cloud in the processing of data by NoSQL DBMS?
What is the role of Cloud in the processing of data by NoSQL DBMS?
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What is a distinguishing feature of NoSQL DBMS in terms of data processing speed?
What is a distinguishing feature of NoSQL DBMS in terms of data processing speed?
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What is the nature of data structure associated with NoSQL DBMS?
What is the nature of data structure associated with NoSQL DBMS?
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What is the primary reason for the inability of Relational DB technology to meet Big Data processing needs?
What is the primary reason for the inability of Relational DB technology to meet Big Data processing needs?
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What is a primary reason for the importance of NoSQL DBMS?
What is a primary reason for the importance of NoSQL DBMS?
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What is a distinguishing feature of NoSQL DBMS in terms of data processing speed?
What is a distinguishing feature of NoSQL DBMS in terms of data processing speed?
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What is the primary reason for the creation of NoSQL DBMS by large corporations?
What is the primary reason for the creation of NoSQL DBMS by large corporations?
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What type of data structure is associated with NoSQL DBMS?
What type of data structure is associated with NoSQL DBMS?
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What is a key characteristic of data that Relational DBMS cannot support?
What is a key characteristic of data that Relational DBMS cannot support?
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What is the role of Cloud in the processing of data by NoSQL DBMS?
What is the role of Cloud in the processing of data by NoSQL DBMS?
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What is one reason for the inability of Relational DB technology to meet Big Data processing needs?
What is one reason for the inability of Relational DB technology to meet Big Data processing needs?
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Which characteristic of data contributes to the rise of NoSQL DBMS?
Which characteristic of data contributes to the rise of NoSQL DBMS?
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What is a distinguishing feature of NoSQL DBMS in terms of data processing?
What is a distinguishing feature of NoSQL DBMS in terms of data processing?
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What is a key characteristic of data that Relational DBMS cannot support?
What is a key characteristic of data that Relational DBMS cannot support?
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Study Notes
Why Business Professionals Need to Know Database Processing
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Business professionals need to have a minimum knowledge about database processing because they work frequently with databases in various aspects (use, purchase, design, etc.)
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In 2023, basic knowledge of database processing is a key skill for any business professional due to the complex nature of the field.
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The database is the center of an Information System (IS); it guides the IS development, and users play a critical role in its development.
What is a Database (DB)
- A database is an organized collection of data with definite elements stored in a computer.
- A database has three elements: tables, relationships, and data dictionary (metadata).
- A table is composed of fields (data type and format), cells (data), and records (data set).
- A primary key is a field that uniquely identifies each record in a table.
- A foreign key is a field that is a primary key of another table, linking tables together.
What is SQL
- SQL (Structured Query Language) is a language used to query a database by selecting data.
- SQL is used to manipulate data, modify the database schema, and grant user access to data.
- SQL is a simple language that allows users to create, process, and administer a database.
What is a Database Management System (DBMS)
- A DBMS is an application used to create, process, and administer a database.
- DBMS activities include memorization, security, concurrency, fault tolerance, and recovery.
- DBMS examples include commercial DBMS (e.g., Oracle, Microsoft SQL Server) and open-source DBMS (e.g., MySQL).
What is Database Processing
- Database processing is the process of retrieving information from data stored in a database.
- A database application system consists of a database, a DBMS, and a database application.
- A database application system is a distributed application that uses a 3-tier architecture.
How to Build a Database
- Building a database involves data modeling and database design.
- Data modeling describes the data to be stored in the database using an E-R diagram.
- Database design transforms entities into tables and relationships between entities into relationships using keys.
Why NoSQL DBMS is Becoming Important
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The increasing amount of data, its high velocity, and great variety (Big Data) require NoSQL DBMS.
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Big Data is characterized by the 4Vs: volume, velocity, variety, and veracity.
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NoSQL DBMS are becoming important due to their ability to handle large amounts of unstructured and semi-structured data.### Why Business Professionals Need to Know about Database Processing
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Business professionals need a minimum knowledge of database processing to work with data collected in databases.
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Acquiring this skill is useful for every career, as data is collected and stored in databases in every organization.
What is a Database (DB)?
- A database is an organized collection of data with definite elements stored in a computer.
- Data is useless without a way to extract information from it.
- Information is not the same as data; it is located inside a person, not a computer, and varies from person to person.
- The DIKW Pyramid is a hierarchical model that categorizes and simplifies the key concepts involved in cognitive processes to create information systems capable of managing large amounts of data.
Structure of a Database
- A database consists of tables, relationships, and a data dictionary.
- A table is a collection of data with columns (fields) and rows (records).
- A field defines a data type and content, and a value defines a data in a specific format.
- A primary key is a field that uniquely identifies the records in a table.
- A foreign key is a field that is a primary key of a different table.
- Relationships between tables are used to eliminate redundant data.
- The data dictionary holds metadata, which is data about the database schema and data.
Relational Databases
- A relational database is obtained using tables, relationships, and a data dictionary.
- The name "relational" comes from the process of dividing tables into smaller tables and recombining them using relationships.
- Relational databases are the most popular type of database, and SQL is used to extract information from them.
What is SQL?
- SQL (Structured Query Language) is a language used to query a database.
- SQL is not only used to select data but also to manipulate data, modify the database schema, and define user access.
- SQL is a powerful and simple language that can be used to create, process, and administer a database.
What is a Database Management System (DBMS)?
- A DBMS is an application used to create, process, and administer a database.
- A DBMS is used to manage the database structure, store and retrieve data, and provide user access.
- DBMS activities include memorization, security, concurrency, fault tolerance, and recovery.
- Examples of DBMS include commercial and open-source options.
What is Database Processing?
- Database processing is the process of retrieving information from data stored in a database.
- Database processing needs a DBMS and a database application.
- A database application system is the sum of a database, a DBMS, and a database application.
- A database application system is a distributed application that uses a 3-tier architecture.
Building a Database
- The building of a database consists of two main activities: data modeling and database design.
- Data modeling creates a logical representation of the database using entities and relationships.
- The E-R model is a tool used for data modeling, which uses boxes for entities and lines for relationships.
- Database design transforms entities into tables and relationships into relationships using keys.
- The result of database design is a database schema.
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Description
Test your knowledge of databases with this quiz! Explore the fundamental elements of a relational database, such as tables, relationships, and data dictionaries. Learn why Excel is not considered a database and delve into the power of structured query language for extracting valuable information from data.
