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For Colorado customers calculate the number of single products ordered. If a product is purchased on multiple orders, it should be counted only single time. The result should conta
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
What type of view of total database content? Data base content Conceptual view of total database contain.
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
Define weak and strong entity sets? Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets. Strong entity set
Explain the Aggregation implies concurrency Concurrency actually is: This in objects can be identified by the way they change state. Present objects can change state independen
Update Operations and Dealing with Constraint Violations There are three basic operations to be executes on relations: Insertion Deletion Update The INSER
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