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For each m:n relationship type R, we make a new table (say S) to represent R. We also contain the primary key attributes of both the participating entity types as a foreign key att
Distributed And Client Server Databases Introduction This unit tells the distributed database systems which are primarily relational and one important execution model: the
Which is the properties of entities? Attributes is the properties of entities.
#question.what is mapping constraints and types?.
Question: (a) Prepare an ERD for the scenario given below. (b) Convert the ER diagram produced in (a) above into its physical design. You have to choose an appropriate Pri
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
Define the five basic operators of relational algebra? Five basic operators of relational algebra are: 1. Union (∪∪∪∪) - Selects tuples which are in either P or Q or in both
explain participation constraints with examples
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