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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: Entity set that has a primary key is term a strong entity set.
real life situations where database management system are most suitable
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Explain view in RDBMS? View - A view is a relation (virtual rather than base) and could be used in query expressions, which is, queries can be written by using the view as a re
What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each. Ans: Completeness Constraints
Dirty Reads: T10 reads a value which is updated by T9. This update has not been committed and T9 aborts. T9 T10 Value of x old value = 200
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
Having clause This clause is used for producing conditions on grouped information. Example: Find maximum salary and department number of those departments where maxim
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
Create centralized relational database using bottom up method. (a) Recognize a single un-normalized relation for the above scenario. (b) Recognize the primary key for
discuss the array implementation of a stack.
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