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Questions and Answers
What is defined as a collection of logically related data?
What is defined as a collection of logically related data?
- Database Application
- Database System
- Database (correct)
- Database Management System (DBMS)
Which of the following best describes a Database Management System (DBMS)?
Which of the following best describes a Database Management System (DBMS)?
- A hardware system that stores data
- A network of database applications
- A software system for defining and maintaining databases (correct)
- A data analysis tool
Which of the following is not considered a typical function of a DBMS?
Which of the following is not considered a typical function of a DBMS?
- Data storage and retrieval
- Data security management
- Data integrity enforcement
- User interface design (correct)
Which statement about database applications is true?
Which statement about database applications is true?
What is a significant advantage of using a DBMS?
What is a significant advantage of using a DBMS?
Which of the following reflects a common use of database systems?
Which of the following reflects a common use of database systems?
Which component is included in a database system?
Which component is included in a database system?
What is typically involved in building your first database?
What is typically involved in building your first database?
Which of the following is NOT a function of a Database Management System (DBMS)?
Which of the following is NOT a function of a Database Management System (DBMS)?
What role does a primary key play in a relational table?
What role does a primary key play in a relational table?
Which benefit of using views in a database is primarily about security?
Which benefit of using views in a database is primarily about security?
Which component of a DBMS includes the actual physical machines and networking equipment?
Which component of a DBMS includes the actual physical machines and networking equipment?
What is a key task during the database design process?
What is a key task during the database design process?
What does the term 'schema' refer to in the context of a DBMS?
What does the term 'schema' refer to in the context of a DBMS?
Which of the following options does NOT describe a type of DBMS service?
Which of the following options does NOT describe a type of DBMS service?
During the database design phase, which of the following is considered a restriction placed on potential designs?
During the database design phase, which of the following is considered a restriction placed on potential designs?
What is a primary disadvantage of using a Database Management System (DBMS)?
What is a primary disadvantage of using a Database Management System (DBMS)?
What feature does MS Access offer that allows users to view data?
What feature does MS Access offer that allows users to view data?
Which of the following statements is true about a database in MS Access?
Which of the following statements is true about a database in MS Access?
Which of the following best describes a query in the context of a DBMS?
Which of the following best describes a query in the context of a DBMS?
What is one of the advantages of having a DBMS?
What is one of the advantages of having a DBMS?
When creating a database in MS Access, what is the suggested first step?
When creating a database in MS Access, what is the suggested first step?
Which type of SQL statement is primarily utilized in MS Access for data queries?
Which type of SQL statement is primarily utilized in MS Access for data queries?
What does the GUI interface of MS Access primarily provide users?
What does the GUI interface of MS Access primarily provide users?
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Study Notes
Introduction to Database Management
- Databases store logically related data and their descriptions
- Database Management Systems (DBMS) provide tools to define, create, and maintain databases, offering controlled access
- DBMS are used for various applications, including credit card purchases, iTunes libraries, navigation systems, academic records, health history, and mobile phone call records
- A database application interacts with a database via SQL statements, while a database system includes the database itself, the DBMS, and interacting database applications
DBMS Environment
- Database systems encompass hardware (PCs, networks), software (DBMS, operating system, network software, application programs), and data, including the schema (data description)
- Database design involves translating application requirements into a database structure, with design rules restricting the design options
- Database design is influenced by the chosen data model, which determines how data is organized
MS Access
- MS Access is a DBMS intended for simple database creation, with limitations on the number of simultaneous users and a GUI interface
- Access uses non-standard SQL and offers both datasheet view and design view for manipulating tables
- An Access DB consists of a database name, tables, fields within tables (representing entities and properties), and field types
DBMS Functionality
- A DBMS typically provides:
- Data storage, retrieval, and update
- Transaction support
- Concurrency control services
- Recovery services
- Authorization services
- Support for data communication
- Integrity services
Views
- Views offer customized perspectives of the database, providing security, customization, and a consistent structure even if the database changes
Relational Data Model (RDM) and Tables
- In the RDM, information is stored in tables, each corresponding to an entity
- Each table has a primary key that uniquely identifies the related entity.
Advantages and Disadvantages of DBMS
- Advantages of DBMS include:
- Control of data redundancy
- Data consistency
- Data sharing
- Improved data integrity
- Improved maintenance through data independence
- Disadvantages of DBMS include:
- Complexity
- Cost
- Conversion costs
- Performance issues
- Increased impact of failure
Accessing Databases
- Queries are requests for data retrieval, specifying the desired data without procedural details
- SQL and graphical tools provide nonprocedural access to databases, improving productivity and accessibility
- Using graphical tools and SQL in MS Access is essential for working with databases
Building your first DB
- Import data from an Excel file into a blank Access database
- Create a new table, name it "Awards," and import the Excel file data
- Allow Access to add the primary key
- Save the database as "SBU_Awards"
- Adjust column widths to improve readability
- Review the database in Access design view
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