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Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert operation.
What should happen to an try to update a candidate key that is the objective of a foreign key reference? For instance, an attempt to update the PROJID "LG" for which there exists at least one matching ASSIGNMENT tuple? In common there are the similar possibilities as for DELETE operation:
RESTRICT: The update operation is "restricted" to the case where there are not matching assignment tuples. (it is rejected otherwise).
CASCADE - The update operation "cascades" to update the foreign key in those matching assignment tuples also.
Project Description: I need a point of sale for motels. It needs to run on windows and requires being network able so that we can have more than one computer using it at once.
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
I have one assignment that has to be done in neo4j
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
in case of functional dependencies how we get the higher normal form.
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
Process of normalization is the integral part of designing a database. Justify this statement with suitable database design
The Form input elements are: Reporter name text type input Password
what is view?explain
What are the various symbols used to draw an E-R diagram (any 3)?
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