Duplication of data
what are the disadvantages of centralized database system
it is time consuming
The logical database is how the data is percieved in the tables, the way the data is actually stored on the storage medium is the physical view of the database.
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Paper-based databases are prone to errors due to manual data entry and can be easily lost or damaged. They are also difficult to scale and not as efficient as digital databases for searching and sharing information. Additionally, paper-based databases require physical storage space and are not environmentally friendly.
Some disadvantages of a paper-based database include limited storage capacity, difficulty in organizing and retrieving information, and susceptibility to damage from physical elements such as fire or water. Additionally, sharing and distributing information can be cumbersome compared to electronic databases.
Some disadvantages of a paper-based database include limited storage capacity, vulnerability to physical damage (such as fire or water), difficulty in data retrieval and sharing, as well as increased risk of errors during data entry and maintenance. Additionally, paper-based databases can be time-consuming to update and maintain compared to digital databases.
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if the computer crashes you can't use it.
IBM Infosphere Data Architect, CA Erwin, Microsoft Access GUI are examples of physical database designer.
You can get the Citywise Indian email database at their physical offices.