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What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Describe the algorithm to draw the dependency graph? Ans: Algorithm to draw Precedence Graph is like this: a. For every transaction T i participating in schedule S, make
What is the use of group by clause? Group by clause is used to be relevant aggregate functions to a set of tuples. The attributes given in the group by clause are used to shape
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Create student database and retrieve course name taught by king? STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (secti
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
Question: (a) Define the term e-Government and briefly explain, using appropriate examples, the aspects it covers. (b) Give four reasons as to why a country should adopt e
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
Consider the following relational schema: Doctor(DName,Reg_no) Patient(Pname, Disease) Assigned_To (Pname,Dname) Give expression in both Tuple calculus and Domain calculus for
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
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