ch6. introduction to database. what is a database? database is a collection of related information....
TRANSCRIPT
![Page 1: Ch6. Introduction to Database. What is a Database? Database is a collection of related information. It is organized so that it can easily be accessed,](https://reader035.vdocuments.us/reader035/viewer/2022062308/56649f415503460f94c60a44/html5/thumbnails/1.jpg)
Ch6. Introduction to Database
![Page 2: Ch6. Introduction to Database. What is a Database? Database is a collection of related information. It is organized so that it can easily be accessed,](https://reader035.vdocuments.us/reader035/viewer/2022062308/56649f415503460f94c60a44/html5/thumbnails/2.jpg)
What is a Database?
• Database is a collection of related information.
• It is organized so that it can easily be accessed, managed, and updated.
![Page 3: Ch6. Introduction to Database. What is a Database? Database is a collection of related information. It is organized so that it can easily be accessed,](https://reader035.vdocuments.us/reader035/viewer/2022062308/56649f415503460f94c60a44/html5/thumbnails/3.jpg)
In the past…Information storage & retrieval
Index card in a library
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In the past…Information storage & retrieval
Customer information on index cards
![Page 5: Ch6. Introduction to Database. What is a Database? Database is a collection of related information. It is organized so that it can easily be accessed,](https://reader035.vdocuments.us/reader035/viewer/2022062308/56649f415503460f94c60a44/html5/thumbnails/5.jpg)
Present..Use of database will…
Reduced data entry, storage, and retrieval costs.
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Present..Use of database will…
Multi users access database at the same time.
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Present..Use of database will…
Data Security is improved. Login is needed &
different users have different access right to database.
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Examples of database system
Personal phone book
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Examples of database system
Employee records of a company
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Examples of database system
Stock control of a supermarket
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Examples of database system
Student records of a school
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Hierarchy of data organization
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Database Management System
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Ensure Data Integrity
• Continues to be accessible. • Consistently organized.
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Ensure Data Security
• Make sure only those with right can access the data.
• i.e. Username and password is needed to access the data. (Microsoft Access don’t have this function)