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What is the initial step for object-oriented designing
The initial step for object-oriented designing is object modeling. Before we go into deep about object modeling first of all we should know "what is the object modeling"? We can say that Object modeling identifies objects and classes in problem domain and identifies the relationship among objects.
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
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
each publisher has uniqe name a mial addrs are also kept on each pubisher.a publisher publish one book.a book publish y one publisher.book identified by isbn.each book writn by one
Database systems have many opposite efforts ?
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
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With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee
i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band
what is the need of a log in dbms
What are the costs to be considered when a transaction has to be rolled back when recovering from deadlock? Ans: A few transaction will must rolled back (made a victim)
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