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What is the use of Union and intersection operation?
Union: The result of this operation contains all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuples are automatically eliminated. Intersection: The result of this relation contains all tuples that are in both r1 and r2.
Explain Thomas' Write rule. Show how it is different from timestamp ordering protol Ans: In timestamp-based concurrency control the thomas Write rule is a rule. Given a Timest
Which element in the database can modified by changing the data dictionary? Data elements in the database can be changed or modified through changing the data dictionary.
can you create a database for me in oracle/sql
A TDMS project plan is not a typical Information Technology project plan; therefore, a traffic data project has several unique characteristics: Traffic data management system
You must implement the entity relationship model provided in the model solution to Assignment 1. The model solution will be released on the course website approximately TWO (2) we
#what is cursor its uses ? Explain it
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
what are information system hirarchy?
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
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