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i want to database for online assignment submission system
It defines that the tuple in one relation that refers to another relation must refer to an existing tuple in that relation. This constraint is states on two relations (not essentia
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
Describe the shadow paging technique.
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
What do you understand by a view? What does WITH CHECK OPTION clause for a view do? - A view is a virtual table which comprises fields from one or more real tables. - It is
What are the various symbols used to draw an E-R diagram (any 3)?
Define Query Processing Query processing is the process of selecting the best plan or strategy to be employed in responding to a database request. The plan is then executed to
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