CIS 1000 Chapter 11: Chapter 11 CIS 1000

• School: University of Guelph
• Department: Computing and Information Science
• Course: CIS 1000
• Professor: Zoe Zhu

Document Summary

Cis - chapter 11 database and information systems. Databases are collections of related data that can be easily stored, sorted, organized and queried: makes data more meaningful and useful, attempting to turn data into information. Problems with lists: inability for data to be shared, data redundancy. Any time complex info needs to be organized, or more than one person access it, a list is no longer efficient. Data redundancy amount of duplicated data between two lists. Data inconsistency if info is overlooked in one list that needs to be changed, it is not consistent with the rest of the lists: hard to tell which entry is correct. Data could also be added to a list in an inconsistent format confusion. Advantages of using databases: can store and retrieve large quantities of information easily, enable information sharing. Only one file is kept, increases efficiency, no need for multiple lists: promote data integrity means that the data is accurate and reliable.