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Transcript
91.309/310
Database I & II
Prof. Cindy Chen
What is a database?
• A database is a very large, integrated collection
of data.
• A database management system (DBMS) is a
software package designed to store and manage
data efficiently, e.g., MS Access, MySQL, IBM
DB2, Oracle, MS SQL Server.
Database applications
•
•
•
•
•
Banking: all transactions
Airlines: reservations, schedules
Universities: registration, grades
Sales: customers, products, purchases
Manufacturing: production, inventory, orders, supply
chain
• Human resources: employee records, salaries, tax
deductions
Databases touch all aspects of our lives.
Why use databases?
•
•
•
•
•
•
Efficient storage
Ease of use
Integrity check
Atomicity of updates
Concurrent access by multiple users
Security/access control
Why study databases?
• It’s fun!
– Interesting projects
• There are jobs!
– More than 1000 database related job openings
posted on monster.com within the past 24 hours
•
•
•
•
Database developers/analysts
Database administrators (DBA)
Database architect
Etc.
The course pair
• Database I
– What everybody needs to know about
databases – how to be an effective user of
databases
• Database II
– What you need to know to be a database
guru and make big bucks