Podcast
Questions and Answers
What is the primary purpose of a key in a database?
What is the primary purpose of a key in a database?
Which of the following is NOT a part of good database design?
Which of the following is NOT a part of good database design?
In the DIKAR model, which component directly follows data?
In the DIKAR model, which component directly follows data?
What type of data is NOT recognized in basic database types?
What type of data is NOT recognized in basic database types?
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What characterizing feature is essential for a primary key field?
What characterizing feature is essential for a primary key field?
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Study Notes
Basic Database Concepts
- Databases use tables organized into records and fields
- A key field uniquely identifies a record
- Relational databases allow data access from multiple tables without reorganisation
- Database design must be reliable, consistent and have structure for easy data addition without change
- Data structure must be designed before adding data
Types of Data
- Integers
- Floating-point numbers
- Characters
- Character strings
- Boolean values (e.g., True/False)
Basic Database Design Rules
- Choose relevant fields; separate data with undetermined entry numbers into separate tables
- Avoid derived fields (e.g., don't need name if you have ID)
- Break down data into its smallest parts (e.g., city, state)
- Use clear, consistent, and detailed field names
- Use unique field names and avoid spaces
- Avoid calculated fields in Access; export to Excel if needed
- Use primary keys for no duplicate data entries; use auto numbers if not a unique key
Knowledge
- Knowledge is the understanding of rules needed to interpret information
- Knowledge workers rely primarily on knowledge as their capital
- Explicit knowledge is easily articulated
- Tacit knowledge is difficult to transfer and is learned ability
DIKAR Model
- Data → Information → Knowledge → Action → Results (or reversed RAKID)
- Operational use and strategic use of knowledge
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Description
Test your knowledge on fundamental database concepts, including data types, relational databases, and design rules. This quiz covers key principles that ensure reliable and structured database management. Perfect for beginners or anyone looking to refresh their database skills.
