23.database
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A database is a collection of information that is organized so that it can be easily accessed, managed, and updated. Databases store data in one or more tables, which each contain records and fields. Some key reasons for using a database include that they allow large amounts of information to be stored efficiently, they make finding and sorting data quickly and easy, and they allow multiple users to access the same data simultaneously. Common examples of databases include those used by schools to store student records, hospitals to store patient information, and the government to store tax records. Proper security measures are important to protect database content and users from unauthorized access.
23.database
- 2. Database CONTENT • What database is • Why to use database? • How to use database?
- 4. Database management system • A database management system (DBMS) is a computer software application that interacts with the user, other applications, and the database itself to capture and analyze data.
- 6. Why to use database? • Databases can store very large numbers of records efficiently (they take up little space).
- 7. Why to use database? • It is very quick and easy to find information. SELECT * FROM toprank.customer WHERE cus_phone='9911%';
- 8. Why use database? • Data can be sorted easily, for example into ‘cus_fname' order.
- 9. Why to use database? • It is easy to add new data and to edit or delete old data. • Data can be imported into other applications . • More than one person can access the same database at the same time -multi- access. • Security may be better than in paper files.
- 10. How to use database • When a database holds details about people, it's likely to include their first name, surname and their date of birth. In addition to this, specialist information is stored depending on the database's intended use. • The police have details of all known criminals in a database, crimes they've comitted. • Schools use a database to store details about their pupils, how many days they've been off school sick.
- 11. How to use database • A hospital will store details of all its patients in a database, eg a history of their health issues. • The Government uses a database to store records of people's income tax payments. • A database is used to keep track of all the drivers in central London who have (or haven't) paid the Congestion Charge.
- 12. Database organization • Tables Records and Fields A database is collection of entities or tables.
- 13. Database organization A design view is a look at the structure of a table as it is being designed. Students (in Design View) field name data type length allow nulls first_name Text 32 No last_name Text 64 No birth_date Date 10 No gender Char 1 Yes
- 14. Database organization • A query view is a look at the data in rows and columns. Notice the field names from design view are the column headers in query view. Students (in query View) first_name last_name birth_date gender Peter Rawsthorne 28/12/1963 M David Rawsthorne 26/10/1961 Lisa Rawsthorne 11/03/1965 F Malcolm Rawsthorne 03/05/1987 M Hannah Rawsthorne 23/09/1989 F
- 15. Database organization • MySql query (in query View)
- 16. Database security • Database security deals with all various aspects of protecting the database content, its owners, and its users. It ranges from protection from intentional unauthorized database uses to unintentional database accesses by unauthorized entities (e.g., a person or a computer program).
- 17. Conclusion • А database is an organized collection of data. Databases can store information about people, products, orders, or anything else. • Some of the more popular database software applications include desktop solutions like Microsoft Access and FileMaker Pro and server solutions like MySQL, Microsoft SQL Server and Oracle. • Databases can store very large numbers of records efficiently
- 18. Any questions ?
- 19. Thank you